3 watt, water resistant, multi-function bike light with mount. 100 yard+ range! Batteries Included. Super bright, 3 watt, white LED with tested range of over 100 yards! Durable, water resistant case easily detatches from mounting clamp. 3 Functions: High beam, low beam, and flashing Non-slip handlebar clamp with 3 adapters fits all handlebars. Uses 4 AAA batteries, included.