Enhance your night riding experience with a rechargeable bike tail light designed for safety and visibility. Featuring 5 lighting modes, this waterproof taillight ensures adaptability in diverse conditions. Specification: Product material: PC, LED: 9 red, Charging time: about 2.5 hours, Product size: 48x48x23mm/1.88 x 1.88 x 0.90inch, Waterproof level: daily waterproof, Lighting mode: 5 gears, Discharge time: high brightness - 5 hours; low brightness - 13.5 hours; slow flash - 25 hours; tail light high brightness + other brightness - 2.5 hours; tail light flash + other flash - 9 hours, Battery capacity: 500mA, Button mode: manual + intelligent, Intelligent sensing: yes. Packing List: Bike Tail Light*1 piece, Seat Post Buckle*1 piece, Rubber Fixing Strap*1 piece, Sit Bow Buckle*1 piece, Cable Tie*4 pieces, Sponge Pad*2 pieces, USB Charging Cable*1 piece. Note: Due to different lighting and screen settings, the item color may be slightly different from the picture. Due to different manual measurements, please allow a 1-2cm difference in size. Real-Time Collision Prevention: Real-time brake sensing technology detects braking actions instantly, enhancing visibility and triggering alerts to reduce risks of rear-end collisions during night rides. Warning Function: The bike tail light improves rider visibility by alerting nearby vehicles to maintain safe distances, projecting clear lane markers in low-light conditions for added safety while cycling at night. Eco-Friendly Power Solution: Equipped with USB-C charging for rapid recharging, extending battery usage while supporting an eco-conscious approach to minimize waste. Easy Installation: Designed for broad compatibility using rubber straps zip ties or seatpost clamps making it simple to attach the tail light securely in different bike types. All-Weather Clarity: Featuring ultra-bright LEDs that assure visibility in daylight and stay clear in rain, fog, or glare, this high-performance LED lighting maximizes rider awareness.