SecurityIng 4 Modes Waterproof 1800Lm 2 LEDs Headlamp Bicycle Light with Long / Short Range Super Bright Bike Headlight + 4000mAh Rechargeable Battery + Charger (Black) This is a high level bicycle light, machined from aerospace aluminum with hard anodic oxidation. Utilizes 2 x Cree XM-L2 LED, its brightness can be up to 1800 lumens, lifespan can reach 50,000 hours. Made of aviation aluminum alloy,applies the high efficient booster circuit to the internal wiring, can utilize the batteries to a maximum extent. Adopts high quality 8.4V DC Li-ion waterproof battery pack, headband and O rings, it can be used as bicycle headlight and headlamp. With the design of long/short range light, 10Hz strobe light and one/two work exchange, it can be multi- purpose choice. 4 switch modes and suitable for outdoor activities like camping, hiking, traveling and so on.