SecurityIng High Power 500LM LB-XL T6 LED 3-Modes Bicycle Headlamp with Charger Adapter for Outdoor Activities Adopting 1X CREE XM-L LED chip, the brightness can be up to 500 lumens. 3 switch modes and rotatable design, the headlamp can be swivelled for different needs. The head strap is flexible and comfortable to wear, convenient for your outdoor activities. Powered by 2 x 3.7V 18650 Battery (Not Included). Designed with a charging interface in the battery case for convenient charging the battery. Fit for various kinds of outdoor activities, such as camping, traveling, hiking, cycling and etc.