Builtin brakesensing taillight that improves rider safety by automatically lighting when you slow or stop, alerting vehicles and cyclists behind you. Key benefits Increases visibility and reduces the risk of rearend collisions by activating automatically when you brake. brightness LED provides clear visibility in lowlight conditions so other road users see you earlier. IPX6 waterproof rating protects performance in heavy rain and wet conditions. Rechargeable battery eliminates the need for disposable cells and keeps the light ready for regular use. Multiple lighting modes let you choose the appropriate signal for traffic, speed, and visibility needs. What it does for you Automatically warns drivers and riders behind you when you slow or stop, so you don't have to remember to toggle modes manually. Maintains reliable visibility in dawn, dusk, night, and adverse weather, helping you ride with more confidence. Adapts to different riding conditions with selectable modes, balancing visibility and battery use. Important attributes Function: Builtin brake sensing + selectable lighting modes. Light source: brightness LED for improved visibility. Weather resistance: IPX6 waterproof housing for performance in rain and splashes. Power: Rechargeable internal battery for repeatable charging and use. Compatibility: Designed for rearbike use across common riding styles (city commuting, mountain biking, casual cycling). Construction: Durable, waterresistant housing for reliable outdoor use. Typical applications Night or earlymorning city commute: Automatically signals braking to drivers at intersections and in traffic. Mountain biking or gravel rides: Enhances rear visibility on fast descents and through shaded trails, even in damp conditions. Casual weekend rides and group outings: Improves group awareness when slowing or stopping to prevent pileups. Simple, practical safety upgrade — a reliable taillight that combines automatic brake sensing, strong LED visibility, waterproof durability, multiple modes, and a rechargeable battery to keep you seen and safer on every ride.