Features 800 Lumens Bike headlight gives you awesome visibility and keep safe distance in the dark. Bike speedometer with accurate tracking on speed and distance helps you to get more fun of your cycling trip or easily achieve your fitness goals. 120dB speaker provide a clear warning for passers-by riders and cars. Please enjoy cycling with this wonderful gadget in the anytime to feel your speed! Specifications Name: NEWBOLER Bike Computer Horn Light Model: BK-1920 Headlight brightness: 800 lumens Lighting mode: High/Low/Flash Effective range: 200m Electronic horn: About 120 dB Lamp Light working time: 5hrs/10hrs Computer working time: 3000hrs Rechargeable Battery: 4000mAh Charging mode: USB charging Recharge time: 4hrs Sensor battery: CR2032 Sensor working time: 12months, 1hr/day Waterproof: IP65 Weight: about 145g Size: about 110*40* 35mm Color: Green