Color Black Brand UltraFire Model F99-L2 Quantity 1 Piece Material Aluminum alloy Emitter Brand Cree LED Type XM-L2 Emitter BIN U2 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 Actual Lumens 679 lumens Runtime 2-3 Hour Number of Modes 4 Mode Arrangement Others1-mode: 10% 2-mode: 30% 3-mode: 60% 4-mode: 100% 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 5.5-2.1mm Battery Pack Interface Size 5.5-2.1mm 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 2 second to power off; It will change to 60% mode automatically if the temperature is over 60'C; The red light is on under low voltage Packing List 1 x Bicycle headlamp(70cm-cable) 2 x Gaskets