Nitecore MH2C CREE XM-L U2 LED USB Rechargeable 800 Lumens Flashlight, Black Maximum output of 800 lumens USB rechargeable with included Nitecore 18650 rechargeable Li-ion battery Compatible with one 18650 rechargeable (included) or 2 X CR123 Lithium batteries (not included) Multiple output modes are conveniently accessed via rapid rotary switch Waterproof in accordance with IPX-8 (submersible to two meters)