Meet the Smart Headlight That Shines Brighter for LongerThe Garmin Varia UT800 is a sleek headlight that shines bright for longer. It can be mounted on your handlebars or helmet and can adjust it's brightness based on ambient light conditions. High-intensity cycling headlight for urban and trail use thats visible in daylight from more than 1 mile (1.6 km) away Projects a steady blast of 800 lumens for up to 1.5 hours Automatically adjusts to ambient light conditions, speed and ride profile1 to extend battery life Works independently or pairs with compatible Edge cycling computers to automatically turn lights on or off, control brightness and more Offers 5 light modes, including high, medium, low, night flash and day flashDimensions (LxWxH): 96.6 mm x 33.5 mm x 29.7 mm; 44.7 mm with flangeWeight: 130.0 gBattery life: 1.5 hours, high; 3.0 hours, medium; 6.0 hours, low; 25.0 hours, day flash; 6.0 hours, night flashLumens: 800CREE LED: yesDegrees of visibility: 270°Visibility distance: 1