This is a product that integrates the functions of codewatch, bicycle headlight and horn. It is compact and easy to install, bringing more convenience and safety to cycling. Features: Cut-OFF line light, anti-glare, non-dazzling, non-disturbing, safer riding. The horn/headlight dual-line control button is designed for convenient operation and safer riding. High decibel electronic horn, one-button switching of five horn sounds. Large and clear LCD screen for easy reading. Total mileage/total driving time/clock/stopwatch/calorie switch at will. Automatically enter sleep mode without use for 3 minutes, and automatically wake up after sensing vibrations. USB recharging design, recharging at any time, more convenient. Daily waterproof design, no fear of sudden rainy days. Specifications: Color: black, blue, red, green (optional) Lumen: 450lm Battery, 3.7V, 2000mAh Material: ABS Item size: 119 x 58 x 90mm / 4.7 x 2.3 x 3.5in Package size: 130 x 94 x 82mm / 3.7 x 3.2in Package weight: 311g / 11.0ounce Packing List: 1 x USB Cable 1 x Tie 1 x Button Cable 1 x Speed Meter 1 x Button Fixing Belt 2 x Antislip Gasket 1 x Sensor 1 x Magnet 2 x Bracket Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin