Happyjoy Bike Light Set Front and Rear Combinations - Zoomable Aluminum LED Headlight and Tailight with Mount - Quick Release Bright CREE Q5 LED Bike Light 500 LM, brilliantly light up your way! Perfect for night ride. Strobe modes will grab Drivers' attention even in daylight and on any weather conditions. Installs in Second, no tool required. Both headlight and back light are equipped with a screw that can be handled manually. Quick Release, Headlight can be detached and use as a Flashlight. High Quality Material! Made of solid Aluminum Alloy. We have checked every light before sent. Duralbe and Waterproof! Bike headlight supports 3 lighting modes: high, low and strobe, Focus adjustable. Bike taillight: 7 modes with Angle adjustable quick release mount. NOTE: About the flashlight, you can use 3 x AAA Battery or 18650 battery for the flashlight. When you use 3 x AAA Battery, please remove the portable 23mm cartrige. Also please confirm the battery or battery case is in the correct direction.