SecurityIng Outdoor Waterproof 500Lm LED Bicycle Light & Headlamp with 4400mAh Battery Pack Super Bright Bike Headlamp - Features LB-XL T6 LED with max output 500 lumens 3 Modes Available - Intelligent circuit control, single button on the back of the lamp cycles through multiple settings(full beam - low beam - strobe mode) Long battery life - Powered by 8.4V 4400mAh 18650 rechargeable battery, works at least 3-4 hours on high lighting Can be used as Headlamp or Bicycle light - The bike light comes with a head strap and 2 rubber sealing ring, either handlebar mount or head strap mount is available. With elastic rubber band sealing ring, it can also working as a headlamp. easy to install and use. Waterproof Design- Support normal use in torrential rain. Perfect item for outdoor sports, such as camping, traveling, hiking