Introduction
Thank you for purchasing the XOSS XR01 Bicycle Tail Light. This manual provides detailed instructions for the proper setup, operation, and maintenance of your device. Please read this manual thoroughly before use to ensure optimal performance and safety.

Image: XOSS XR01 Smart Tail Light with its main features.
Package Contents
Please check the package to ensure all items are present:
- XOSS XR01 Tail Light x 1
- Saddle Bracket x 1
- Seatpost Bracket x 1
- Type-C Charging Cable x 1
- Rubber Band x 1
- Fastening Bands x 4
- User Manual x 1

Image: Detailed view of the XOSS XR01 package contents.
Setup and Installation
The XOSS XR01 supports two easy installation methods without requiring any tools.
1. Seatpost Mount
- Attach the seatpost bracket to your bicycle's seatpost.
- Secure the bracket using the provided rubber band.
- Slide the XOSS XR01 tail light onto the mounted bracket until it clicks into place.
2. Saddle Mount
- Attach the saddle bracket to the rails under your bicycle saddle.
- Secure the bracket using the provided fastening bands.
- Slide the XOSS XR01 tail light onto the mounted bracket until it clicks into place.

Image: XOSS XR01 tail light installed on a seatpost.

Image: Installation diagrams for seatpost and saddle mounts.
Operating Instructions
Power On/Off
- To Power On: Press and hold the power button for 2 seconds.
- To Power Off: Press and hold the power button for 2 seconds.
Mode Switching
- While the light is on, short press the power button to cycle through different lighting modes.
- The device features mode memory, automatically recalling the last used mode when powered on.
Automatic On/Off Function
The XR01 is equipped with an intelligent vibration sensor:
- The light automatically turns on when vibration (movement) is detected.
- If no movement is detected for 30 seconds, the light will automatically turn off to conserve battery.

Image: Automatic On/Off feature in action.
Smart Brake Sensor
The built-in brake sensor enhances safety by detecting deceleration:
- When braking is detected, the tail light automatically illuminates at its maximum brightness.
- This alerts vehicles and pedestrians behind you, significantly improving your visibility and safety.

Image: The XOSS XR01 tail light with its smart brake sensor activated.
Video: Demonstration of the XOSS XR01 bicycle tail light's features, including automatic on/off and brake sensing.
Charging
The XOSS XR01 uses a convenient Type-C charging interface.
- Connect the provided Type-C charging cable to the tail light and a USB power source (e.g., computer, wall adapter).
- A full charge takes approximately 1 hour.
- The light will indicate charging status (e.g., solid light while charging, off when fully charged).

Image: Charging the XOSS XR01 tail light with a Type-C cable.
Specifications
| Feature | Description |
|---|---|
| Model | XR01 |
| Waterproof Rating | IPX6 |
| Charging Interface | Type-C |
| Charging Time | Approx. 1 hour |
| Battery Life | 7-16 hours (depending on mode) |
| Standby Time | Up to 3 months |
| Sensors | Vibration sensor, Brake sensor |
| Lens Type | Innovative Optical Lens (Anti-glare, High Visibility) |
| Material | Imitation Carbon Fiber Texture surface |
Maintenance
- Cleaning: Wipe the tail light with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Water Resistance: The device is IPX6 waterproof, meaning it is protected against powerful water jets. It can withstand heavy rain but should not be submerged in water.
- Storage: Store the tail light in a cool, dry place when not in use for extended periods. Charge the device periodically (e.g., every 3 months) to maintain battery health.
- Battery Care: Avoid completely draining the battery frequently to prolong its lifespan.

Image: XOSS XR01 tail light demonstrating its IPX6 waterproof capability.
Troubleshooting
- Light not turning on: Ensure the battery is charged. Press and hold the power button for 2 seconds to turn it on.
- Automatic on/off not working: Check if the device is securely mounted and if there is sufficient vibration to trigger the sensor. Ensure the auto-on feature is enabled (if applicable, refer to mode switching).
- Brake sensor not responding: Ensure the light is firmly attached and positioned correctly. The sensor relies on deceleration to activate.
- Short battery life: Ensure the device is fully charged. Battery life can vary based on the selected lighting mode. Extreme temperatures can also affect battery performance.
- Charging issues: Try a different Type-C cable or USB power source. Ensure the charging port is clean and free of debris.
Warranty and Support
For warranty information and customer support, please refer to the official XOSS website or contact your retailer. Keep your purchase receipt as proof of purchase.

