SecurityIng 2400 Lumens 4 x XM-L T6 LED Bicycle Light + 4000mAh Battery Pack for Hiking, Riding, Camping and Other Outdoor Activities Super Bright Bike Headlamp - Adopts 4 X Cree XM-L T6 LEDs, Maximum brightness comes to 2400 lumens. 4 Modes Available - Intelligent circuit control, single button on the back of the lamp cycles through multiple settings(full beam - middle beam- low beam - strobe mode) 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. Long battery life - Comes with 8.4V 4000mAh rechargeable lithium battery pack as power source, works at least 1.5 ~ 2 hours on high lighting Waterproof Design & Sturdy and durable- Anodized aluminum with glass lens, waterproof and weather resistant. Perfect item for outdoor sports, such as camping, traveling, hiking, cycling, searching. Enclosure with aviation aluminum alloy, CNC machining,anodizing surface treatment.