【Wireless Remote Control】Convenient wireless remote control for easy operation of turn signals and light modes while riding. 【Multiple Light Modes】Features various modes including steady red light, flashing red light, left and right turn signals, and combination modes for enhanced visibility. 【USB Rechargeable】Equipped with a 500mAh rechargeable lithium battery, ensuring long-lasting performance and easy charging via USB. 【Versatile Design】Suitable for mountain bikes and various cycling applications, improving safety during night rides and in low-light conditions. 【Durable Construction】Made with high-quality ABS plastic for durability and weather resistance, designed to withstand various cycling conditions. Specifications: Size: 12.5*3.7cm Shell material: ABS Light battery: 500mAh rechargeable lithium battery*1 Remote control battery: 1 3V CR2032 button battery Lighting mode: Red light always on, red light single flash, left turn single flash, right turn single flash, left turn single flash + red light always on, right turn single flash + red light always on, left turn + red light flash together, right turn + red light flash together, double jump (full flash)