K252588 · Zhejiang Taotao Vehicle Co., Ltd. · INI · Dec 4, 2025 · Physical Medicine
Device Facts
Record ID
K252588
Device Name
Mobility Scooter (T5)
Applicant
Zhejiang Taotao Vehicle Co., Ltd.
Product Code
INI · Physical Medicine
Decision Date
Dec 4, 2025
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.3800
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
It is motor driven, indoor and outdoor transportation vehicle with the intended use to provide mobility to a disabled or elderly person limited to a seated position.
Device Story
Motorized three-wheeled vehicle (T5) provides mobility for disabled or elderly users in seated position; operates in indoor and outdoor environments. Device features steel frame, foldable tiller, and removable battery pack; user-operated via integrated control system. Principle of operation involves electric motor propulsion; device transforms battery power into mechanical motion for transport. Healthcare providers or caregivers do not operate device; patient self-operates. Output is physical mobility; device enhances patient independence by facilitating movement. No AI/ML algorithms present.
Clinical Evidence
Bench testing only. No clinical data presented. Safety and performance verified through comprehensive testing per ISO 7176 series (stability, braking, distance range, obstacle climbing, EMC, electrical safety, and biocompatibility per ISO 10993-1).
Indicated for disabled or elderly persons limited to a seated position requiring indoor and outdoor mobility assistance.
Regulatory Classification
Identification
A motorized three-wheeled vehicle is a gasoline-fueled or battery-powered device intended for medical purposes that is used for outside transportation by disabled persons.
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FDA U.S. FOOD & DRUG ADMINISTRATION
December 4, 2025
Zhejiang Taotao Vehicle Co., Ltd.
% Eva Li
Consultant
Shanghai SUNGO Management Consulting Co., Ltd.
Room 1401, Dongfang Building, 1500# Century Ave.
Shanghai, 200122
China
Re: K252588
Trade/Device Name: Mobility Scooter (T5)
Regulation Number: 21 CFR 890.3800
Regulation Name: Motorized Three-Wheeled Vehicle
Regulatory Class: Class II
Product Code: INI
Dated: November 4, 2025
Received: November 4, 2025
Dear Eva Li:
We have reviewed your section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (the Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database available at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device"
U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov
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K252588 - Eva Li
Page 2
(https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181).
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reporting-combination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-devices/medical-device-safety/medical-device-reporting-mdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
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K252588 - Eva Li
Page 3
Sincerely,
Tushar Bansal -S
Tushar Bansal, PhD
Acting Assistant Director, Acute Injury Devices Team
DHT5B: Division of Neuromodulation and
Physical Medicine Devices
OHT5: Office of Neurological and
Physical Medicine Devices
Office of Product Evaluation and Quality
Center for Devices and Radiological Health
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Mobility Scooter
Page 11 of 50
| Indications for Use | | |
| --- | --- | --- |
| Please type in the marketing application/submission number, if it is known. This
textbox will be left blank for original applications/submissions. | K252588 | ? |
| Please provide the device trade name(s). | | ? |
| Mobility Scooter (T5) | | |
| Please provide your Indications for Use below. | | ? |
| It is motor driven, indoor and outdoor transportation vehicle with the intended use to provide mobility to a
disabled or elderly person limited to a seated position. | | |
| Please select the types of uses (select one or both, as
applicable). | ☐ Prescription Use (Part 21 CFR 801 Subpart D)
☑ Over-The-Counter Use (21 CFR 801 Subpart C) | ? |
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# 510(K) Summary
Application Information: Zhejiang Taotao Vehicle Co.,LTD.
Device Name: Mobility Scooter
Model: T5
Classification: II
Product Code: INI
Regulation:890.3800
Panel: Motorized three-wheeled vehicle
Date prepared: Aug 5,2025
Substantial Equivalence Information:
510Knumber: K231428
Device Name: Mobility Scooter
Model: W3431D
Zhejiang Innuovo Rehabilitation Devices Co., Ltd.
# 1. Product Parameter
Table 1 General Comparison
| Elements of Comparison | Subject Device (K252588) | Predicate Device (K231428) | Remark |
| --- | --- | --- | --- |
| Manufacturer | Zhejiang Taotao Vehicle Co.,LTD. | Zhejiang Innuovo Rehabilitation Devices Co.,Ltd | NA |
| Device name | Mobility Scooter | Mobility Scooter | Same |
| Model(s) | T5 | W3431D | -- |
| Indications for use | It is a motor driven, indoor and outdoor transportation vehicle with the intended use to provide mobility to a disabled or elderly person limited to a seated position. | It is a motor driven, indoor and outdoor transportation vehicle with the intended use to provide mobility to a disabled or elderly person limited to a seated position. | Same |
| Overall dimension | 1240mm*610mm*875mm | 1020 mm x 500 mm x 840 mm | Similar |
| Frame Material | Steel | Steel | |
| Frame style | Foldable tiller, removable battery pack, disassemble for transport | Foldable seat, removable battery pack, disassemble for transport | Similar |
| Rear Wheels Quantity | 2 | 2 | Same |
| Ground clearance | 20 mm | 45 mm | Similar |
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Analysis: Subject device control system has passed the requirements of ISO 7176 series and test results meet its design specification.
Table 2 safety comparison
| Item | Proposed Device | Predicate Device | Results |
| --- | --- | --- | --- |
| Biocompatibility | All user directly contacting materials are compliance with ISO10993-1 | All user directly contacting materials are compliance with ISO10993-1 | Same |
| EMC | ISO7176-21& IEC 60601-1- | ISO7176-21& IEC 60601-1- | Same |
| Biotransporter | ISO7176-21& IEC 60601-1- | ISO7176-21& IEC 60601-1- | Same |
| Biotransporter | ISO7176-21& IEC 60601-1- | ISO7176-21& IEC 60601-1- | Same |
| Biotransporter | ISO7176-21& IEC 60601-1- | ISO7176-21& IEC 60601-1- | Same |
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| Item | Proposed Device | Predicate Device | Results |
| --- | --- | --- | --- |
| ISO7176-1 | The Static stability has been determined after the testing according to the ISO 7176-1, and test results meet its design specification. | The Static stability has been determined after the testing according to the ISO 7176-1, and test results meet its design specification. | Same |
| ISO7176-2 | The dynamic stability has been determined after the testing according to the ISO 7176-2, and test results meet its design specification. | The dynamic stability has been determined after the testing according to the ISO 7176-2, and test results meet its design specification. | Same |
| ISO7176-3 | The effectiveness of brakes has been determined after the testing according to the ISO 7176-3, and test results meet its design specification. | The effectiveness of brakes has been determined after the testing according to the ISO 7176-3, and test results meet its design specification. | Same |
| ISO7176-4 | The theoretical distance range has been determined after the testing according to the ISO 7176-4, and test results meet its design specification. | The theoretical distance range has been determined after the testing according to the ISO 7176-4, and test results meet its design specification. | Same |
| ISO7176-5 | The dimensions, mass has been determined after the testing according to the ISO 7176-5, | The dimensions, mass has been determined after the testing according to the ISO 7176-5, | Same |
| ISO7176-6 | The dimensions, mass has been determined after the testing according to the ISO 7176-5, | The dimensions, mass has been determined after the testing according to the ISO 7176-5, | Same |
| ISO7176-7 | The seating and wheel dimensions has been determined after the testing according to the ISO 7176-7, | The seating and wheel dimensions has been determined after the testing according to the ISO 7176-7, | Same |
| ISO7176-8 | All test results meet the requirements in Clause 4 of ISO 7176-8 | All test results meet the requirements in Clause 4 of ISO 7176-8 | Same |
| ISO7176-9 | The test results shown that the device under tests could continue to function according to manufacturer's specification after being subjected to each of the tests specified in Clause 8 | The test results shown that the device under tests could continue to function according to manufacturer's specification after being subjected to each of the tests specified in Clause 8 | Same |
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| | of ISO 7176-9 | specified in Clause 8 of ISO 7176-9 | |
| --- | --- | --- | --- |
| ISO7176-10 | The obstacle-climbing ability of device has been determined after the testing according to the ISO 7176-10, | The obstacle-climbing ability of device has been determined after the testing according to the ISO 7176-10, | Same |
| ISO7176-11 | The test dummies used in the testing of ISO 7176 series are meet the requirements of ISO 7176-11 | The test dummies used in the testing of ISO 7176 series are meet the requirements of ISO 7176-11 | Same |
| ISO7176-13 | The coefficient of friction of test surfaces has been determined, which could be used in other 7176 series tests involved | The coefficient of friction of test surfaces has been determined, which could be used in other 7176 series tests involved | Same |
| ISO7176-14 | All test results meet the requirements in Clause 7, 8, 9, 10, 11, 12, 13, 14, 15, 17 of ISO 7176-14 | All test results meet the requirements in Clause 7, 8, 9, 10, 11, 12, 13, 14, 15, 17 of ISO 7176-14 | Same |
| ISO7176-15 | The test results shown that information disclosure, documentation and labelling of device meet the requirements of ISO 7176-15 | The test results shown that information disclosure, documentation and labelling of device meet the requirements of ISO 7176-15 | Same |
| ISO7176-16 | The performance of resistance to ignition meet the requirements of ISO 7176-16 | The performance of resistance to ignition meet the requirements of ISO 7176-16 | Same |
| ISO 7176-21 | The EMC performance results meet the requirements of ISO 7176-21, IEC 60601-1-2:2014+A1:2020 | The EMC performance results meet the requirements of ISO 7176-21, IEC 60601-1-2:2014+A1:2020 | Same |
| ISO 7176-22 | The performance of resistance to ignition meet the requirements of ISO 7176-22 | The performance of resistance to ignition meet the requirements of ISO 7176-22 | Same |
| ISO7176-25 | The performance of batteries and charger of device meet the Requirements in Clause 5 and 6 of ISO 7176-25 | The performance of batteries and charger of device meet the Requirements in Clause 5 and 6 of ISO 7176-25 | Same |
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# Substantial Equivalence Discussion
The proposed device and predicate device are complying to the same ISO standards, ISO 7176-1, ISO 7176-2, ISO 7176-3, ISO 7176-4, ISO 7176-5, ISO 7176-6, ISO 7176-7, ISO 7176-8, ISO 7176-9, ISO 7176-10, ISO 7176-11, ISO 7176-13, ISO 7176-14, ISO 7176-15, ISO 7176-16, ISO 7176-21, ISO 7176-22, ISO 7176-25, and FDA guidance Submission for Scooter.
The proposed device performs in a similar manner to the predicate device. All these tests have corresponding requirements/ control criteria following above mentioned standards. And the test results show that the subject product is substantially equivalent to the predicate device in performance.
The performance testing demonstrates that the subject device is substantially equivalent to the predicate devices regarding Static ability (Scooter tipping angle), The Dynamic stability (Safe Gradient Maximum Gradient), Brake performance, Theoretical distance range, Dimension and weight, Maximum speed, Dimension of wheel Static, impact and fatigue strengths, Climatic tests, Obstacle-climbing ability, Dummy, friction of test surfaces, Power and control systems, Documentation and labeling, Resistance to ignition, Electromagnetic Compatibility and Electrical Safety, Batteries and chargers.
The non-clinical laboratory data support the safety and performance of the subject device and demonstrate that the subject device should perform as intended in the specified use conditions.
## 3. Substantially Equivalency Conclusion
Based on the comparison and analysis above, the subject device is determined to be Substantially Equivalent (SE) to the predicate devices, W3431D Scooter from Zhejiang Innuovo Rehabilitation Devices Co., Ltd. K231428.
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1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
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Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
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Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
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Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
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Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
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Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
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How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.