Features1Rechargeable: This bike lamp set is powered by battery and rechargeable, and is lightweight, has small size, convenient to carry. 2Waterproof: This bike light is not afraid of wind and rain, driving is not afraid of muddy water, and has good waterproof performance. 3High Brightness: High power, high brightness, bright light, so that you can see a wider and farther area when riding at night, making your riding safer. 4Multiple Uses: It can be used as an emergency flashlight in the car and basement, and can be used when cycling, running, hiking, camping, walking dogs, night activities, power failure, etc. 5Eco Friendly Material: This mountain bike warning light is made of aluminum alloy, which is environmentally friendly and durable.SpecificationItem Type: Bike Lamp SetMaterial: Aluminium Alloy, ABSGross Weight: 250g / 8.8ozBattery Type: the flashlight requires one 18650 battery or three AAA batteries, the tail lamp requires two AAA batteries (shipped without batteries)Package List1 x Flashlight1 x Tail Light2 x Support Accessories1 x Charging Accessories