Enhanced Cycling Safety: Equipped with a high-sensitivity brake sensor, this LED rear light enhances your visibility and safety by automatically brightening when . Versatile Lighting Modes: Choose from 6 different lighting modes to suit various weather and traffic conditions, ensuring you're always visible to other road users. and Waterproof: Crafted for outdoor adventurers, the light is waterproof and built to withstand all weather conditions, making it your reliable partner in any environment. USB Rechargeable: Forget about replacing batteries. This light comes with a USB rechargeable feature, providing long-lasting illumination on a single charge, making it both eco-friendly and cost-effective. Universal Fit: Designed to fit a wide range of bicycles, including road bikes and mountain bikes, ensuring easy installation and a secure fit for worry-free rides. Color:As shown Material:Plastic + Electronic Components + Silicone Package Contents: 1 * Smart LED Bicycle Rear Light 1 * Silicone fixing belt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.