brand new and high quality Features: 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. All 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. 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. Specification: Type:Tail Light Suitable for:Motorcycle,Mountain Bicycle,Road Bike,Bicycle,Electric Bicycle Brightness: 100 lumens Battery: 3.7V 500MAH polymer lithium battery Suitable for the diameter: 12-32MM Changliang brightness full battery life about 3 hours Material: Plastic Size: app.4.3x1.7x2.7cm/1.69x0.67x1.06in Color: Black Power Supply: USB Charging Quantity: 1 Set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Bike Rear Light 1 x USB Charging Cable 1 x Strap