Introduction
This manual provides comprehensive instructions for the Jxrev J51 Wireless Earbuds. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device. Please read this manual thoroughly before using the product.

Image: Jxrev J51 Wireless Earbuds in dark blue, showing the charging case open with one earbud inside and the other earbud resting beside it. The earbuds and case are a deep blue color.
Safety Information
Please observe the following safety precautions:
- Choking Hazard: This product contains small parts and is not suitable for children under 3 years of age. Keep out of reach of small children.
- Avoid extreme temperatures and direct sunlight.
- Do not disassemble or modify the device.
- Keep the charging port dry and clean.
- Do not expose to fire or dispose of in fire.
What's in the Box
Upon opening the package, ensure all the following items are present:
- Jxrev J51 Wireless Earbuds (Left and Right)
- Portable Charging Case
- USB-C Charging Cable
- User Manual (this document)

Image: The complete package contents for the Jxrev J51 Wireless Earbuds, showing the dark blue earbuds, their charging case, a white USB-C charging cable, and the user manual.
Specifications
| Feature | Detail |
|---|---|
| Model Name | J51 |
| Bluetooth Version | 5.4 |
| Connectivity Technology | Wireless (Bluetooth) |
| Audio Driver Size | 13 mm Dynamic Driver |
| Playtime (Single Charge) | 6-8 hours |
| Total Playtime (with Charging Case) | Up to 32 hours |
| Charging Time (Case) | 1 hour (USB-C) |
| Water Resistance Level | IP7 Waterproof |
| Earbud Weight | 3 grams (each) |
| Control Type | Touch Control |
| Noise Control | Sound Isolation, Noise Cancelling Mic |
| Compatible Devices | Cellphones, Laptops, Tablets (iOS, Android, PC) |

Image: An internal view of the Jxrev J51 earbud highlighting the Bluetooth 5.4 chip and noise-cancelling microphone, indicating a stable connection and 15-meter range.

Image: A cutaway view of the Jxrev J51 earbud, illustrating the 13mm large-size dynamic driver responsible for crystal clear sound with deep bass and crisp highs.
Setup
Initial Pairing
- Ensure your device's Bluetooth is turned on.
- If you have previously connected the earbuds to another device, delete the "J51" Bluetooth connection from that device's settings page.
- Place both earbuds into the charging case.
- Close the lid of the charging case to ensure the earbuds are charging.
- Open the charging case lid and take out both earbuds. They will automatically enter pairing mode.
- On your device, search for Bluetooth devices and select "J51" from the list to connect.
- The earbuds will automatically pair with your device when you take them out of the case after the first successful connection.

Image: A visual guide to the one-step pairing process, demonstrating how the earbuds automatically connect to a device upon opening the charging case. It also shows options for single, binaural, and sharing modes.

Image: A comprehensive diagram illustrating both the setup process (deleting old connections, placing in case, taking out) and the various touch controls for the Jxrev J51 earbuds.
Wearing the Earbuds
Gently insert each earbud into your ear canal. Rotate the earbud slightly until it feels secure and comfortable. The ergonomic design ensures a snug fit for various activities.
Operating Instructions
Touch Controls
The J51 earbuds feature intuitive touch controls on both the left (L) and right (R) earbuds. Refer to the table below for specific functions:
| Action | Left Earbud (L) | Right Earbud (R) |
|---|---|---|
| Play/Pause Music | Double Tap | Double Tap |
| Answer/End Call | Double Tap | Double Tap |
| Next Song | N/A | Double Tap |
| Previous Song | Double Tap | N/A |
| Reject Call | Hold for 2 seconds | Hold for 2 seconds |
| Volume Down | Single Tap | N/A |
| Volume Up | N/A | Single Tap |
| Activate Voice Assistant | Triple Tap | Triple Tap |

Image: An illustration of the Jxrev J51 earbud highlighting its ergonomic design and smart touch control capabilities, with icons for various functions like answering calls, hanging up, skipping tracks, play/pause, voice assistant, and volume adjustment.

Image: A smartphone screen showing a "Personal Voice Assistant" interface, indicating the earbuds' compatibility with voice assistant features.
Listening Modes
- Single Mode: Use one earbud independently for calls or music while the other is in the charging case.
- Binaural Mode: Use both earbuds together for a stereo audio experience.
- Sharing Mode: Share one earbud with another person while you use the other, allowing two people to listen to the same audio source.

Image: Two scenarios illustrating the use of earbuds: "Mono Mode" showing a single person using one earbud, and "Twin Mode" showing two people sharing the earbuds.
Maintenance
Charging the Earbuds and Case
To charge the earbuds, place them back into the charging case. The case will automatically charge the earbuds. To charge the case itself, connect the provided USB-C cable to the charging port on the case and a power source.
- Earbuds playtime on a single charge: 6-8 hours.
- Total playtime with fully charged case: Up to 32 hours.
- Charging case full charge time: Approximately 1 hour via USB-C.

Image: The Jxrev J51 earbuds and charging case, illustrating their battery life with icons for 6-8 hours of single playtime, 32 hours of total playtime with the case, and USB-C fast charging.

Image: The Jxrev J51 earbuds and charging case prominently displaying "32 hrs", signifying the total battery life available with the charging case.
Cleaning and Care
- Wipe the earbuds and charging case with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners or solvents.
- The earbuds are IP7 waterproof, meaning they are protected against temporary immersion in water. However, the charging case is not waterproof. Avoid exposing the charging case to liquids.
- Ensure the charging contacts on the earbuds and inside the case are clean and dry before charging.

Image: The Jxrev J51 earbuds shown with water droplets splashing around them, visually representing their IP7 waterproof capability, suitable for sports and outdoor activities.
Troubleshooting
If you encounter issues with your Jxrev J51 Wireless Earbuds, please refer to the common problems and solutions below:
Earbuds Not Pairing/Connecting
- Solution 1: Ensure both earbuds are charged. Place them in the charging case, close the lid, and then open it again to re-initiate pairing.
- Solution 2: Turn off Bluetooth on your device, then turn it back on. Forget or delete "J51" from your device's Bluetooth list and try pairing again from scratch.
- Solution 3: Ensure the earbuds are within the Bluetooth range (up to 10 meters) of your device.
No Sound or Low Volume
- Solution 1: Check the volume level on both your device and the earbuds (using touch controls).
- Solution 2: Ensure the earbuds are properly seated in your ears.
- Solution 3: Disconnect and reconnect the earbuds to your device.
- Solution 4: Clean any debris from the earbud speaker mesh.
Charging Issues
- Solution 1: Ensure the USB-C cable is securely connected to both the charging case and the power source.
- Solution 2: Try a different USB-C cable or power adapter.
- Solution 3: Clean the charging contacts on the earbuds and inside the case with a dry cotton swab.
Warranty and Support
Jxrev products are designed for reliability and performance. For warranty information or technical support, please visit the official Jxrev website or contact their customer service. Keep your purchase receipt as proof of purchase.
For further assistance, you may visit the Jxrev Store on Amazon.



