Product Description LED Bike light uses 3x Cree XM-L T6 LEDs as its light source， high quality and reliable. With intelligent circuit control and 4 switch modes which can contrl the different brightness conveniently. It also supports fixing on the bicycle with the rubber ring， working as a bicycle lamp Besides， comes with elastic rubber band sealing ring with the lamp， it can also working as a headlamp， it's quite easy to install and use. This is a perfect light for Outdoor sports enthusiasts with its excellent performence in waterproof. It's perfect for camping， traveling， hiking， searching， climbing， etc. Features: - Super bright: up to 3800 lumens output and 200m irradiation range. - Anodized aluminum with glass lens， waterproof and weather resistant. - Can be used as headlamp or bicycle light，easy to install and use. - Mounting accessories included for helmet or head wear. - Comes with a 6400mAh rechargeable lithium battery pack. Specifications: - Size: 55mm (Length) x 45mm (Diameter) - Color: Black + Silver - Brightness: 3800 lumens - Bulbs: 3x Cree XM-L T6 LED - Lifespan: 100，000 hours - Lighting distance: 200m - 4 Switch modes: Low / Middle / High / Strobe - Battery: External 6400mAh lithium battery pack - Charging time: 4 hours - Runtime: 2 hours (high mode) - Material: Aluminum Alloy - Waterproof level: IP65 - Shipping weight: 518g - Charger Input: 100V-240V， 50/60Hz - Output: DC 8.4V / 1.2A~3.6A Package Includes: 1 x LED Bike Headlight 1 x 8.4V 6400mAh Battery Pack 1 x Charger 2 x Rubber Rings 1 x Headband