The Advantages are Extensive: *Super Bright Headlamp ， waterproof， adjustable， Handsfree，Zoomable *Parallel battery design £º2 Rechargeable 18650 parallel design， a battery also can work. *Single button control switch . 3 switch modes: high output， Low output， and strobe. Specification Model of LED: XML T6 Lifespan: 100，000 hours Brightness:700 to 1000 lumens(10W) Light Range:0-200 m Color: as picture Headlight Diameter:3.8cm Headlamp Material:made of aluminumalloy casing and rubber+ adjustable and elastic headband Single button control switch，3 Switch Mode: Hight light， Low light， Strobe Parallel battery design :2 x 18650 3.7V rechargeable li-ion battery(Included)， a battery also can work. Battery: it can be used about 6 hours(according to the brightness) Package Includes: 1*KissAir(TM) LED Headlamp 1*USB Cable 2* Rechargeable Batteries (4200amh) 1*US Charger 1*Car Charger 1*Phone Charging Cable