Color Black Brand UitraFire Model F88-L2 Quantity 1 Piece Material Aluminum alloy Emitter Brand Cree LED Type XM-L2 Emitter BIN T6 Number of Emitters 1 Color BIN Cool White Working Voltage 7.2~8.4 V Power Supply 4 x 18650 (not included) Current 2000 mA Theoretical Lumens 750 lumens Actual Lumens 750 lumens Runtime 2~3 Hour Number of Modes 4 Mode Arrangement HiMidLowSlow StrobeOthersUltra bright Mode Memory No Switch Type Reverse clicky Lens Glass Reflector Aluminum Smooth Flashlight Mounting Handlebar and Helmet Switch Location Head Beam Range 200 m Bike Lamp Interface Size 5.5 x 2.1mm Battery Pack Interface Size 5.5 x 2.1mm Other Features Powered by 8.4V series connection and parallel connection 18650 or 26650 batteries pack; Connector: 5.5 x 2.1mm battery pack is not included; Long press for 2 seconds to power off; It will change to 60% mode automatically if the temperature is over 60'C; Red light is on for low voltage Packing List 1 x Bicycle headlamp( 70cm-cable) 2 x Plastic rings