Introduction
This manual provides detailed instructions for the safe and effective use of your FVZ Massage Gun JA-G4. Please read this manual thoroughly before operation and retain it for future reference. This device is designed to provide deep tissue muscle relief and aid in recovery.

Image: The FVZ Massage Gun JA-G4, showcasing its ergonomic design, the product packaging, and the four interchangeable massage heads.
Safety Information
Before using the FVZ Massage Gun, please read and understand all safety warnings and instructions. Improper use may result in injury or device damage.
- Do not immerse the device in water or other liquids.
- Do not operate continuously for more than 15 minutes. Allow 30 minutes of rest before re-using.
- Do not use on open wounds, inflamed areas, or areas with skin conditions.
- Consult a physician before use if you have any medical conditions, are pregnant, or have a pacemaker.
- Keep out of reach of children.
- Use only the provided charging cable. Do not modify or disassemble the device.
- Avoid using the device on bony areas or directly on joints.
Package Contents
Your FVZ Massage Gun JA-G4 package includes:
- FVZ Massage Gun with Extended Handle
- Round Head Attachment
- Fork Head Attachment
- Flat Head Attachment
- Bullet Head Attachment
- USB Type-C Charging Cable
- User Manual (this document)
Product Features
The FVZ Massage Gun JA-G4 is designed for deep tissue muscle relief and features:
- Extended Ergonomic Handle: A 120° curved design allows for easy reach to difficult areas like the back and shoulders, enhancing self-massage capabilities.
- 10MM Deep Tissue Percussion: Provides effective amplitude for deep muscle relaxation and pain relief.
- Powerful Brushless Motor: Ensures durable and efficient operation with a long lifespan.
- Ultra-Quiet Operation: Operates at less than 45 decibels, allowing for a peaceful massage experience without disturbance.
- Long Battery Life: Offers up to 15 days of use (based on 15 minutes per day) on a single 90-minute charge via USB Type-C.
- 5 Speed Levels: Adjustable intensity from 1000 RPM to 2600 RPM to customize your massage experience.
- 4 Interchangeable Massage Heads: Specialized attachments for targeting various muscle groups and specific needs.
- Lightweight Design: Weighs approximately 1.1 lbs (490g) for portability and ease of handling.

Image: A close-up of the FVZ Massage Gun highlighting its easy-hold extended handle and the 120-degree ergonomic arc designed for full-body massage.

Image: A user comfortably operating the FVZ Massage Gun on her arm, illustrating the device's ultra-quiet design (45dB) for a serene massage experience.
Setup
Charging the Device
- Before first use, fully charge the massage gun.
- Connect the USB Type-C charging cable to the charging port on the device and to a compatible USB power adapter (not included).
- The indicator lights will illuminate to show the charging status. A full charge takes approximately 90 minutes.
- The device offers up to 15 days of use (based on 15 minutes per day) on a single charge.
Attaching Massage Heads
- Ensure the device is powered off before attaching or removing massage heads.
- Gently push the desired massage head into the front opening of the device until it is securely seated.
- To remove, gently pull the massage head straight out.
Operating Instructions
Power On/Off
- To power on the device, press and hold the power button for 2 seconds.
- To power off the device, press and hold the power button for 2 seconds.
Adjusting Speed Levels
- Once powered on, press the power button briefly to cycle through the 5 speed levels.
- Each press will increase the intensity. The indicator lights will show the current speed level.
- The 5 speed levels are:
- Level 1 (1000 RPM): To activate muscles.
- Level 2 (1600 RPM): To release myofascial tissues.
- Level 3 (2000 RPM): To decompose lactic acid.
- Level 4 (2200 RPM): To massage deeper tissues.
- Level 5 (2600 RPM): For a professional massage experience.

Image: A visual representation of the FVZ Massage Gun's 10MM amplitude and its five adjustable speed levels, ranging from 1000 RPM to 2600 RPM for customized massage.
Usage Guidelines
- Apply the massage head to the desired muscle area. Move the device slowly and gently over the muscle.
- Do not apply excessive pressure; allow the percussion action to do the work. Applying too much pressure may cause the motor to slow or stop.
- Limit each massage session to 15 minutes. The device has an automatic shut-off feature after 15 minutes of continuous use.

Image: A woman demonstrating the use of the FVZ Massage Gun on her upper back, highlighting how the extended handle allows access to hard-to-reach areas for muscle relief.
Massage Head Guide
The FVZ Massage Gun includes four specialized massage heads for targeted relief:
- Round Head: Suitable for large muscle groups like arms, back, hips, thighs, and calves. Ideal for general full-body massage.
- Fork Head: Designed for the neck, spine, and Achilles tendon. Use with caution around bony areas.
- Flat Head: Versatile for all body parts, especially for chest, waist, and overall muscle relaxation.
- Bullet Head: For precise targeting of trigger points, deep tissue, and small muscle areas like feet and palms.

Image: A visual guide to the four interchangeable massage heads—Round, Fork, Flat, and Bullet—with illustrations indicating their optimal use for different body parts and muscle groups.
Maintenance and Care
Cleaning
- Wipe the device with a slightly damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Ensure the device is powered off and unplugged before cleaning.
Storage
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Keep it away from moisture.
Battery Care
- To prolong battery life, avoid fully discharging the battery frequently.
- Charge the device regularly, even if not in use for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Low battery | Charge the device fully using the provided USB Type-C cable. |
| Device stops during use | Automatic 15-minute shut-off | Restart the device after a brief rest period (recommended 30 minutes). |
| Device stops during use | Excessive pressure applied | Reduce pressure on the muscle. Allow the device's percussion action to work without forcing it. |
| Massage head is difficult to attach/remove | Incorrect alignment or debris | Ensure the head is aligned correctly and push/pull gently but firmly. Check for any obstructions. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | JA-G4 |
| Product Dimensions | 13.6 x 8.35 x 2.33 inches |
| Item Weight | 1.1 lbs (490g) |
| Power Source | Battery Powered (1 Lithium Polymer battery required) |
| Charging Time | Approx. 90 minutes |
| Runtime | Up to 15 days (based on 15 minutes per day) |
| Speed Levels | 5 (1000-2600 RPM) |
| Amplitude | 10MM |
| Noise Level | < 45 dB |
| Material | Acrylonitrile Butadiene Styrene |
| Manufacturer | JiAn Health (ShenZhen) Technology Co.,Ltd. |
Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official FVZ website. Please retain your proof of purchase for any warranty claims.





