Color White + Silver Brand Others Quantity 2 Piece Material Acrylic + zinc alloy Emitter BIN LED Color BIN Blue Number of Emitters 5 Input Voltage 4.5 V Battery 3 x AG10 (included) Battery included or not Yes Current 100 mA Theoretical Lumens 25 lumens Actual Lumens 20 lumens Runtime 4~8 Hour Number of Modes 1 Mode Arrangement Slow Strobe Mode Memory No Switch Type OthersVibration sensor Switch Location OthersVibration sensor Beam Range 50~100 m Strap/Clip No Application Wheel Waterproof Yes Other Features 26 English letters alternately flashing suitable for UK / US / French style bikes / motorcycles / cars. Packing List 2 x Bike wheel lights