TENS & EMS Device

K213835 · Shenzhen Jian Feng Electronic Technology Co., Ltd. · NUH · Mar 3, 2022 · Neurology

Device Facts

• Record ID: K213835
• Device Name: TENS & EMS Device
• Applicant: Shenzhen Jian Feng Electronic Technology Co., Ltd.
• Product Code: NUH · Neurology
• Decision Date: Mar 3, 2022
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 882.5890
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

TENS: The device is designed to be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, neck, upper extremities (arm), lower extremities (leg), abdomen and bottom due to strain from exercise or normal household work activities. EMS: The device is designed to be used to stimulate healthy muscles in order to improve or facilitate muscle performance.

Device Story

Portable, battery-powered (3.7V DC) TENS/EMS device; 4 channels; 24 operation modes; 20 adjustable intensity levels. Inputs: user-selected programs/intensities. Transformation: device generates biphasic, rectangular electrical pulses; transmitted via lead wires/snap buttons to FDA-cleared adhesive electrode pads (conductive carbon film/hydrogel). Output: electrical stimulation causing muscle contractions. Used in home/clinic settings by adult patients. LCD screen displays program, level, time, and channel. Healthcare provider/patient uses output to manage pain or improve muscle performance. Benefits: non-pharmacological pain relief and muscle conditioning.

Clinical Evidence

Bench testing only. Compliance with ANSI/AAMI/ES 60601-1, IEC 60601-1-2, IEC 60601-2-10, and IEC 60601-1-11. Biocompatibility testing per ISO 10993-5 and ISO 10993-10. Software verification performed per FDA guidance.

Technological Characteristics

Portable, 4-channel TENS/EMS stimulator; 3.7V lithium battery; ABS housing. Biphasic rectangular waveform; regulated voltage control. Connectivity: wired electrodes. Software-controlled with 24 modes, 20 intensity levels, and timer (10-80 min). Standards: ANSI/AAMI/ES 60601-1, IEC 60601-1-2, IEC 60601-2-10, IEC 60601-1-11, ISO 10993-5/10.

Indications for Use

Indicated for adults (age ≥ 18) for temporary relief of pain in shoulder, waist, back, neck, upper/lower extremities, abdomen, and bottom due to exercise or household strain (TENS), and for stimulation of healthy muscles to improve/facilitate muscle performance (EMS).

Regulatory Classification

Identification

A transcutaneous electrical nerve stimulator for pain relief is a device used to apply an electrical current to electrodes on a patient's skin to treat pain.

Predicate Devices

• TENS & EMS Device (K202866)

Submission Summary (Full Text)

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March 3, 2022

Shenzhen Jian feng Electronic Technology Co. Ltd. Feng Wen GM 902,903 Jialingyu Industrial Building, Da Pu Road Houting Village, Shajing Town, Baoan District Shenzhen, Guangdong 518104 China

Re: K213835

Trade/Device Name: TENS & EMS Device Regulation Number: 21 CFR 882.5890; 21 CFR 890.5850 Regulation Name: Transcutaneous Electrical Nerve Stimulator For Pain Relief: Powered muscle stimulator Regulatory Class: Class II Product Code: NUH, NGX Dated: December 9, 2021 Received: December 9, 2021

Dear Feng Wen:

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 (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 located 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.

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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 of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-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 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 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-device-safety/medical-device-reportingmdr-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/medicaldevices/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-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely.

for Heather Dean, PhD 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

Enclosure

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# Indications for Use

510(k) Number (if known) K213835

Device Name TENS & EMS Device

Indications for Use (Describe) TENS:

The device is designed to be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, neck, upper extremities (arm), lower extremities (leg), abdomen and bottom due to strain from exercise or normal household work activities.

EMS:

The device is designed to be used to stimulate healthy muscles in order to improve or facilitate muscle performance.

Type of Use (Select one or both, as applicable)

| Prescription Use (Part 21 CFR 801 Subpart D)

|X| Over-The-Counter Use (21 CFR 801 Subpart C)

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# 510(k) Summary

This summary of 510(K) safety and effectiveness information is being submitted in accordance with the requirement of 21 CFR 807.92.

Type of 510(k) submission: Traditional

Date of the summary prepared: Jan-30-2022

Submitter's Information

Submitter: SHENZHEN JIAN FENG ELECTRONIC TECHNOLOGY CO., LTD.

Address: 902, 903 Jialingyu Industrial Building, Da Pu Road, Houting Village, Shajing Town, Baoan District, Shenzhen City, Guangdong Province, China.

Contact Person: Feng Wen

Email: [e-mail]

Tel: [phone] Fax: [phone]

Application Correspondent

Company: SHENZHEN JIAN FENG ELECTRONIC TECHNOLOGY CO., LTD.

Address: 902, 903 Jialingyu Industrial Building, Da Pu Road, Houting Village, Shajing Town, Baoan District, Shenzhen City, Guangdong Province, China.

Contact Person: Fenq Wen

Title: General Manager

Email: [e-mail]

Tel: [phone] Fax: [phone]

#### The Predicate Device Information

| Basic Information | Predicate Device |
|-------------------|----------------------------------------------------|
| Manufacturer | Shenzhen Jian Feng Electronic Technology Co., Ltd. |
| Device Name | TENS & EMS Device |
| Model | FM-B2403 |
| 510(K) Number | K202866 |
| Product Code | NUH, NGX |
| Panel Code | Physical Medicine, Neurology |
| Regulation Number | 21 CFR 882.5890 |
| | 21 CFR 890.5850 |
| Regulation Class | Class II |

Subject Device Information

Trade Name: TENS & EMS Device Common Name: TENS, EMS, Stimulator for pain relief; Classification Name: Transcutaneous electrical nerve stimulator for pain relief; Powered muscle stimulator Review Panel: Physical Medicine; Neurology

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Product Code: NUH,NGX Regulation Number: 21CFR882.5890, 21CFR890.5850 Device Classification: Class II Use: Over-the-Counter Use (OTC)

## Device Description / Design of Device

The device of the model TU3424-F is a portable, battery powered (lithium battery 3.7V DC) multifunction device offering both Transcutaneous Electrical Nerve Stimulator (TENS) and Powered Muscle Stimulator (EMS) qualities in one device, it can be used for arm, shoulder, neck, back, waist, abdomen, and leg.

4 channels that effectively transfer your desired choice of programmed electrical pulses directly through electrode adhesive pads to the suggested area of the body where the electrodes are placed, causing minimal muscle contractions. There are 24 modes of operations.

The electrode pads are cleared by FDA, and 510(k) number is K092546 for the electrode pads. They are used as an accessory to the TENS or EMS device unit, which transmits electrical current to patient skin. The electrical current is first transmitted via the lead wire or snap button then transmitted to the conductive gel which is adhered to patient skin. The electrode pads are composed of a cover, connector lead wire or snap button, conductive carbon film, conductive hydrogel, and an electrode carrier liner. It is non-sterile and intended for single adult patient (age ≥ 18) multiple application use.

Its output waveform is provided 24 programs and 20 adjustable intensity levels. The LCD screen shows the information of program, level, operating time and channel.

Indication for Use

## TENS:

The device is designed to be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, neck, upper extremities (leg), abdomen and bottom due to strain from exercise or normal household work activities.

EMS:

The device is designed to be used to stimulate healthy muscles in order to improve or facilitate muscle performance.

Technological characteristics and substantial equivalence The following table is the basic characteristic:

| Contents | New device | Predicate Device | SE |
|------------------------|-------------------------------------------------------|-------------------------------------------------------|----|
| Trade Name | TENS & EMS Device | TENS & EMS Device | SE |
| Device Model | TU3424-F | FM-B2403 | / |
| 510(k) Number | K213835 | K202866 | / |
| Manufacturer | Shenzhen Jian Feng Electronic<br>Technology Co., Ltd. | Shenzhen Jian Feng Electronic<br>Technology Co., Ltd. | SE |
| Regulatory Information | 882.5890, 890.5850 | 882.5890, 890.5850 | SE |
| Classification | Class II | Class II | SE |
| Product code | NUH, NGX | NUH, NGX | SE |

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| Panel | Physical Medicine; Neurology | Physical Medicine; Neurology | SE | |
|-----------------------------------------------|-------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----|
| OTC/RX | OTC | OTC | SE | |
| Intended Use | | TENS: The device is designed to<br>be used for temporary relief of pain<br>associated with sore and aching<br>muscles in the shoulder, waist,<br>back, neck, upper extremities<br>(arm), lower extremities (leg),<br>abdomen and bottom due to strain<br>from exercise or normal household<br>work activities.<br>EMS: The device is designed to be<br>used to stimulate healthy muscles<br>in order to improve or facilitate<br>muscle performance. | TENS: The device is designed to<br>be used for temporary relief of pain<br>associated with sore and aching<br>muscles in the shoulder, waist,<br>back, neck, upper extremities<br>(arm), lower extremities (leg),<br>abdomen and bottom due to strain<br>from exercise or normal household<br>work activities.<br>EMS: The device is designed to be<br>used to stimulate healthy muscles<br>in order to improve or facilitate<br>muscle performance. | SE |
| Apply parts of the body | | Shoulder, waist, back, neck, upper<br>extremities (arm), lower extremities<br>(leg), abdomen and bottom | Shoulder, waist, back, neck, upper<br>extremities (arm), lower extremities<br>(leg), abdomen and bottom | SE |
| Power Source | | Built-in 3.7V lithium battery | Built-in 3.7V lithium battery | SE |
| - Method of Line Current<br>Isolation | | BF | BF | SE |
| - Patient Leakage Current | | / | / | |
| - Normal condition | | <10μΑ | <10μΑ | SE |
| - Single fault condition | | <50μΑ | <50μΑ | SE |
| Number of Output Modes | | TENS:10, EMS:5 | TENS:19, EMS:5 | SE |
| Number of Output Channels | | 4 | 4 | SE |
| Synchronous or alternating | | Synchronous | Synchronous | SE |
| Method of Channel Isolation | | By electrical circuit and software | By electrical circuit and software | SE |
| Regulated Current or<br>Regulated Voltage | | Regulated voltage control | Regulated voltage control | SE |
| Software/Firmware/Micropro<br>cessor Control? | | Software | Software | SE |
| Automatic Overload Trip? | | No | No | SE |
| Automatic No-Load Trip? | | No | No | SE |
| Automatic Shut Off? | | Yes | Yes | SE |
| Patient Override Control? | | Yes | Yes | SE |
| On/Off Status? | | Yes | Yes | SE |
| Low Battery? | | Yes | Yes | SE |
| Voltage/Current<br>Level? | | Yes | Yes | SE |
| Timer Range (minutes) | | 10~80 | 10~80 | SE |
| | | | | |
| Compliance with Voluntary<br>Standards? | Yes. | Yes | SE | |
| | ANSI/AAMI/ES 60601-1 | ANSI/AAMI/ES 60601-1 | | |
| | IEC60601-1-2 | IEC60601-1-2 | | |
| | IEC 60601-2-10 | IEC 60601-2-10 | | |
| | IEC60601-1-11 | IEC60601-1-11 | | |
| | ISO10993-5<br>ISO10993-10 | ISO10993-5<br>ISO10993-10 | | |
| Accessories | Self-adhesive electrodes,<br>electrode wires, adapter, USB<br>cable | Self-adhesive electrodes,<br>electrode wires, adapter, USB<br>cable | SE | |
| Compliance* with 21 CFR<br>898? | Yes | Yes | SE | |
| Weight(g) | 110 | 82 | SE,<br>Note 1 | |
| Dimensions (mm) [D x W H] | 161*60*16.5 | 110*60*15 | SE | |
| Housing Materials and<br>Construction | ABS | ABS | SE | |
| Biocompatibility | All user directly contacting<br>materials are compliance with<br>ISO10993-5 and ISO10993-10<br>requirements | All user directly contacting<br>materials are compliance with<br>ISO10993-5 and ISO10993-10<br>requirements | SE | |
| Comparison in details:<br>Note 1: | | | | |

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The proposed device TU3424-F has passed the IEC 60601-1 and AAMI / ANSI ES60601-1 test . The weight, dimensions, appearance of proposed device TU3424-F has a little different from predicate device K202866, but these differences are insignificant and won't raise any new risk of safety and effectiveness..

The following table is the output parameters:

| Contents | Proposed Device | Predicate Device | SE |
|--------------------------------------------------------------------------------------------------------|-----------------------------------|-------------------------------------|---------------|
| Device Name, Model | TU3424-F | FM-B2403 | / |
| Waveform (e.g., pulsed monophasic,<br>biphasic) | Biphasic | biphasic | SE |
| Shape (e.g., rectangular, spike,<br>rectified sinusoidal) | Rectangular | rectangular | SE |
| Maximum Output Voltage (volts) (+/-<br>10%) | 60@500Ω<br>95@2KΩ<br>153@10kΩ | 97.6@500Ω<br>135@2KΩ<br>157@10KΩ | SE<br>Note 1 |
| Maximum Output Current (mA) (+/-<br>10%) | 120@500Ω<br>47.5@2kΩ<br>15.3@10kΩ | 195.2@500Ω<br>67.5@2KΩ<br>15.7@10KΩ | SE<br>Note 1 |
| Pulse Duration (us) | 50-300 | 90 | SE,<br>Note 1 |
| Frequency† (Hz) [or Rate† (pps)] | <200 Hz | < 90.9 | SE<br>Note 1 |
| Net Charge (micro coulombs (μC)<br>per pulse) (If zero, state method of<br>achieving zero net charge.) | 0.0001μC @500Ω | 0.001μC @500Ω | SE |
| Maximum Phase Charge, (μC) | 36@500Ω | 15.5@500Ω | SE<br>Note 2 |

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| Maximum Current Density(mA/cm²) | 0.3456@500Ω | 0.1192@500Ω | SE<br>Note 2 |
|---------------------------------|-------------|-------------|--------------|
| Maximum Power Density(mW/cm²) | 1.4930@500Ω | 0.176@500Ω | SE<br>Note 2 |
| Pulses per burst | 2 | 2 | SE |
| Bursts per second | 0.02 | 1/30 | SE<br>Note 2 |
| Burst duration (ms) | 50 | 45 | SE<br>Note 2 |
| Duty Cycle: Line (b) x Line (%) | 6.0 | 1.6% | SE<br>Note 2 |
| ON Time (seconds) | 1 | 1 | SE |
| OFF Time (seconds) | 1 | 1 | SE |

#### Comparison:

Note 1: There are some differences on the maximum output voltage ,maximum Output current, pulse duration, frequency between proposed device and predicate device K202866.All these parameters have passed IEC 60601-2-10 test codes. Therefore, these differences won't raise any new risk of safety and effectiveness.

Note 2:There are some differences on the net charge, maximum current density ,maximum power density, bursts per second, burst duration and duty cycle between the proposed device and the predicate device K202866,but these parameters don't exceed the safety limit and have passed IEC 60601-2-10 test. The maximum average power density <0.25Watts/cm²,Therefore, these differences won't raise any new safety and effectiveness risk.

## Non-Clinical Tests Performed

Compliance to applicable voluntary standards include: ANSI/AAMI/ES 60601-1. IEC60601-1-2. IEC 60601-2-10, IEC60601-1-11.

In addition to the compliance of voluntary standards, the software verification has been carried out according to the FDA Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices.

Final conclusion:

After analyzing non-clinical laboratory studies and safety testing data, it can be concluded that the model TU3424-F is substantially equivalent to the predicate device K202866 (Model: FM-B2403).