Designed for extreme weather IP65 waterproof and dustproof. Aviation aluminum. CNC engraving. Hard anodized. Bike Rear Light and USB Charging Cable and Strap only,other accessories demo in the picture is not included.Type:Tail LightSuitable for:Motorcycle,Mountain Bicycle,Road Bike,Bicycle,Electric BicycleBrightness: 100 lumensBattery: 3.7V 500MAH polymer lithium batterySuitable for the diameter: 12-32MMChangliang 100% brightness full battery life about 3 hoursMaterial: PlasticSize: app.4.3x1.7x2.7cm/1.69x0.67x1.06inColor: BlackPower Supply: USB ChargingQuantity: 1 SetAll clearly visible at night, no matter rainy or foggy. Come with a multifunctional clamp which can be fixed on your backpack or cloth. Useful in cycling, camping, hiking, night run, etc.The bike light will automatically enhance the brightness for 5s if any downhill, brake, deceleration is detected by G-sensor.180 degree field of view width, visibility up to 150m, utilization of high brightness COB, LED and EnSca lens, bright light but not dazzling.