3IN1 bicycle light, bicycle computer bicycle horn combination plus bicycle tail light, USB rechargeable bicycle strong light flashlight, anti glare LED main, outdoor bicycle speedometer and odometer, outdoor bicycle riding equipment, MTB night riding accessories bicycle lamp The paper description of the product is in English, but we can provide electronic instructions in many national languages (German, French, Spanish, Italian, Portuguese, English and Russian). If necessary, send an email and the required language. Material: ABS+Acrylic Size: 100 * 55 * 30mm Beads: anti glare lighting design Light brightness: 300 lumens Battery capacity: 1200mA (3.7V) lithium battery Waterproof grade: IP64 CHARACTERISTIC: automative lighting : 4 modes of flashing warning for backlight headlamp and general beam headlamp.The lighting is designed to prevent dazzle, making night riding safer Code table: Large LCD display Including 22 sub functions such as total mileage maximum speed temperature stopwatch CAL Automatic Sleep and Wireless Automatic Wake up Bicycle Computer Wireless super anti interference data transmission Horn: External wire control switch 100db strong response USB charging: 1200mAh battery, the standby time of bicycle computer is 2 years, and the light life is 4-6 hours The battery indication is accurate (100%, 75%, 50%, 25%), and the battery voltage is lower than At 25%, the light key and horn key will automatically turn off, and can only work after recharging more than 25%.