Color Black + Blue Brand LSON Model LL-537B Quantity 1 Piece Material Plastic Emitter Brand OthersLED LED Type OthersLED Emitter BIN otehrsLED Color BIN Cool White Number of Emitters 1 Working Voltage 3.6~4.5 V Power Supply 3 x AA batteries (not included) Current 150 mA Theoretical Lumens 50 lumens Actual Lumens 20 lumens Runtime 2~3 Hour Number of Modes 1 Mode Arrangement Hi Mode Memory No Switch Type Reverse clicky Switch Location Side Lens Plastic Reflector Plastic Smooth Band Length 20 cm Compatible Circumference 40~80cm Beam Range 50 m Packing List 1 x Headlamp