Soonfire NS17 USB Rechargeable Flashlight:Cree LED 1000 Lumen Waterproof Flashlight,18650 3400mAh Rechargeable Li-ion Batteries,Charging Cable and Holster BODY DESIGN:Water resistant with a hard-anodized finish; anti-abrasive, shock-proof Rechargeable Directly :NS17 will never run out of power,can be recharged by USB cable,USB to wall or car adapter,Friendly red and blue battery indicator; Dimensions:Length 106mm, Head Diameter 32mm,Tail Diameter 25.5mm;Weight:90g (without battery);smallest lightest USB 18650 flashlight; LED:CREE XM-L2 U3,Max output:1000 lumen;Aviation aluminum vacuum electroplating reflecting system;Max luminous flux:13500cd;Max beam distance:232m; Long run time:Precise temperature control system,adjust brightness reasonablely to performance best,Switch for Various Mode( Low-Mid-High-Strobe-Flash-Slow Flash),1000lumen max for 151 minutes,low lumen 320h; Battery:Included one 3400mAh 3.7V 18650 Li-ion Protected Rechargeable Batteries,Support 2 X CR123A or 16340;Smart Li-ion battery charging circuit;Micro -USB adaptable charging port.