Cree XM-L U2 1B CW / CREE XM-L T6 3C NW Brightness: Max Output 2500 Lumes Total Emitters: 3 Battery Configurations: 4*18650rechargeable batteries (not included) Switch: Press switch on the side Modes: 3 Mode Arrangement: Hi > Lo > Strobe Lens: Coated Glass Lens Reflector: Aluminum Smooth/SMO Reflector