Specification: Lamp Beads: COB; Charging: 1.5-2 Hours; Lumen: 60LM; Lighting: 5 Modes; Capacity: 650mAh; Waterproof: IPX6; Color: Black, Gold; Duration Of Endurance: 10 Hours; Type: 1: without alarm, 2: with alarm. Features: 1.The bike light will automatically enhance the brightness for 5s if any downhill, brake, deceleration is detected by G-sensor. 2.180 degree field of view width, visibility up to 150m, utilization of high brightness COB, LED and Ens ca lens, bright light but not dazzling. 3.All clearly visible at night, no matter rainy or foggy. 4.Come with a multi-functional clamp which can be fixed on your backpack or cloth. 5.Useful in cycling, camping, hiking, night run, etc. 6.Designed for extreme weather IP65 waterproof and dust proof. 7.Aviation aluminum. Hard anodized. Package included: 1 x Smart Bike Taillight.