RENPHO R4
RENPHO R4 Massage Gun Instruction Manual
Model: R4 (EU-RF-GM169)
Introduction
Thank you for choosing the RENPHO R4 Massage Gun. This device is designed to provide deep tissue percussion massage, aiding in muscle relaxation and recovery. Please read this manual thoroughly before use to ensure safe and effective operation.
Important Safety Information
WARNING: To reduce the risk of electric shock, fire, and injury, this product must be used in accordance with the following instructions.
- Do not use the massage gun on injured or inflamed areas of the body.
- Keep the device away from water or other liquids. Do not use in wet environments.
- Do not use the device while sleeping or in the presence of flammable materials.
- Be cautious of potential skin irritation or bruising if the device is used improperly or for extended periods on one area.
- Consult a physician before use if you have any medical conditions, are pregnant, or have a pacemaker.
- Keep out of reach of children.
Package Contents
Verify that all items are present in your package:
- RENPHO R4 Massage Gun
- 6 Massage Heads
- Carry Case
- Charging Cable/Adapter
- User Manual (this document)

Image: The RENPHO R4 Massage Gun, showing the main unit, six interchangeable massage heads, and the included carry case.
Setup Guide
1. Charging the Battery
- Before first use, fully charge the massage gun.
- Remove the battery pack from the bottom of the massage gun.
- Connect the charging cable to the battery pack and a power outlet.
- The charging indicator on the battery pack will show charging status (e.g., red for charging, green for full).
- A full charge typically takes approximately 3 hours and can provide up to a week's worth of workouts (based on 15 minutes of daily use).
- Once charged, reinsert the battery pack firmly into the massage gun until it clicks into place.

Image: Illustration of the RENPHO R4 Massage Gun's battery life and charging information, highlighting the 2500mAh battery and 3-hour charge time for approximately one week of use.
2. Attaching Massage Heads
- Ensure the device is powered off before attaching or removing massage heads.
- Select the desired massage head.
- Insert the stem of the massage head firmly into the opening at the front of the massage gun. Push and twist slightly until it is securely seated.
- To remove, gently pull the massage head straight out.

Image: A close-up of the RENPHO R4 Massage Gun showing the different massage heads and how they attach.
Operating Instructions
Power On/Off
- Press and hold the power button (usually located on the handle or control panel) for a few seconds to turn the device on or off.
- The device will automatically shut off after 1 minute of inactivity to conserve battery and prevent overuse.
Adjusting Arm Angles
The RENPHO R4 features 5 adjustable arm angles to help you reach various body parts comfortably.
- Locate the adjustment button or mechanism on the massage gun's arm.
- Press the button and rotate the massage head arm to your desired angle. Release the button to lock it in place.
- Experiment with different positions (1 to 5) to find the most ergonomic angle for targeting specific muscle groups, especially for the back and shoulders.

Image: The RENPHO R4 Massage Gun illustrating its five adjustable arm positions, allowing users to comfortably reach different areas of the body.
Changing Speed Levels
The massage gun offers 4 speed levels for varying intensity:
- Level 1: Wake-up muscles (2000 RPM) - Gentle stimulation for muscle activation.
- Level 2: Fascia release (2400 RPM) - Moderate intensity for releasing fascia tension.
- Level 3: Eliminate lactic acid / Deep tissue massage (2800 RPM) - Stronger percussion for deeper muscle work and lactic acid reduction.
- Level 4: Professional Mode (3200 RPM) - Highest intensity for professional-level deep tissue massage.
Press the speed adjustment button (often integrated with the power button or a separate button) to cycle through the speed levels. Indicator lights will typically show the current speed setting.

Image: A detailed view of the RENPHO R4 Massage Gun's control panel, displaying the four speed levels and battery charge indicators.
Using Different Massage Heads
Each of the 6 included massage heads is designed for specific applications:
| Head Type | Recommended Use |
|---|---|
| L or M Ball Head | For large muscle groups such as quadriceps, glutes, and extreme muscles; also suitable for joint soreness. |
| Fork Head | Designed for the spine, neck, and Achilles tendon. Use with caution around bony areas. |
| Bullet Head | Ideal for joints, deep tissue, trigger points, and small muscle areas like feet and wrists. |
| Flat Head | Versatile for all body parts, providing a general massage. |
| Air Cushion Head | Suitable for sensitive areas and trigger points, offering a softer impact. |

Image: The RENPHO R4 Massage Gun shown with its complete set of six interchangeable massage heads, each designed for different muscle groups and massage intensities.
General Usage Tips
- Apply gentle pressure and move the massage gun slowly over the target muscle area.
- Avoid direct contact with bones, joints, and sensitive areas.
- Do not use for more than 15 minutes on a single muscle group.
- Stay hydrated before and after massage sessions.
Maintenance
Cleaning
- Ensure the device is powered off and unplugged before cleaning.
- Wipe the surface of the massage gun with a slightly damp, soft cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals.
- Clean massage heads with a damp cloth and mild soap if necessary, then dry thoroughly before reattaching.
Storage
- Store the massage gun and its accessories in the provided carry case when not in use.
- Keep the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Do not place heavy objects on top of the device or its case.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Battery is low or depleted. Battery pack not properly inserted. | Charge the battery fully. Ensure the battery pack is securely inserted. |
| Device stops during use. | Automatic shut-off activated (after 1 minute). Battery is low. Overheating protection. | Restart the device. Charge the battery. Allow the device to cool down before resuming use. |
| Massage head falls out. | Massage head not inserted firmly. | Ensure the massage head is pushed in completely and securely. |
| Reduced percussion intensity. | Battery is low. Incorrect speed setting. | Charge the battery. Increase the speed level. |
Specifications
- Model: R4 (EU-RF-GM169)
- Dimensions: 15.2 x 12.6 x 5.2 inches
- Weight: 2.2 Pounds (1 Kilogram)
- Power Source: Battery Powered (1 Lithium Ion battery required)
- Battery Capacity: 2500mAh
- Charge Time: Approximately 3 hours
- Operating Time: Up to 1 week (based on 15 mins/day)
- Speed Levels: 4 (up to 3200 RPM)
- Adjustable Arm Angles: 5 positions
- Noise Level: Less than 45dB
- Material: Metal, Plastic
- Manufacturer: RENPHO
Warranty and Support
RENPHO products typically come with a standard manufacturer's warranty. Please refer to the warranty card included with your product or visit the official RENPHO website for detailed warranty terms and conditions.
For technical support, troubleshooting assistance, or warranty claims, please contact RENPHO customer service:
- Website: www.renpho.com
- Email: Refer to your product packaging or website for specific contact email.
- Phone: Refer to your product packaging or website for specific contact number.
When contacting support, please have your model number (R4 or EU-RF-GM169) and purchase date ready.
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