Smart Alert with Brake Detection Experience the advanced safety and performance of the TR150 series tail light, designed to keep you visible day or night. With smart brake sensing and wide-angle illumination, it automatically adjusts to your ride, ensuring you're always seen from any direction. The IPX6 water-resistant design ensures reliable performance in any weather. And its versatile installation lets you set it up as you prefer. High Visibility Equipped with 4 high-brightness red LEDs, the tail light's flashing mode provides up to 150 lumens of brightness, making it visible from up to 1.5km away. This ensures the rider's safety, especially in low-light conditions 280 Field of View The tail light offers a wide 280 field of view, ensuring that the rider remains visible from multiple angles. This enhances safety by making the rider more noticeable, whether riding at night or during the day Brake detection Automatically highlights the rear light for 3 seconds when braking to alert drivers behind you, effectively preventing you from traffic accidents Auto on-off After being stationary for 2 minutes, the tail light will automatically turn off. When it detects movement from cycling, the tail light will automatically turn on again 6 lighting modes available This light offers 6 different lighting modes, providing flexibility for various riding conditions. Three Installation Options Compatible with round and aero seat post mount, saddle mount and backpack mount USB-C charging port Reversible connector to charge the light easily and no need to flip around looking for the correct orientation IPX6 water-resistance The light is usable when riding in the rain. Product Features Eye-catching flashing with max 150 LED lumens, providing great visibility for daytime riding Built-in motion sensor for brake detection and auto on-off function Special lens design to increase your side visibility when crossing road Auto power save and indicator for low battery USB-C charging port for convenient use IPX6 water-resistance for heavy-rain riding Quick release design and compatible with round and aero seatposts 2 years warranty and limited lifelime warranty Tech Specifications LED: 4* high-efficiency red LEDs Battery: 800mAh/3.7V rechargeable Li-ion battery Dimensions (light unit): 38mm (L)*25mm (W)*57mm (H) Weight (light unit): 50g Design and specifications are subject to change without notice.