Color Black + White Brand OthersRAYPAL Model RPL-2261 Quantity 1 Piece Material Plastic + rubber Emitter Brand OthersLED LED Type OthersLED Emitter BIN OthersLED Color BIN Red Number of Emitters Others16 Input Voltage 3-5 V Battery Built-in 500mAh battery Battery included or not Yes Current 100 mA Theoretical Lumens 30 lumens Actual Lumens 20 lumens Runtime 3-5 Hour Number of Modes 6 Mode Arrangement OthersHi Mid Low Low light strobe Highlight strobe Fast strobe (Cycling long press the switch 2 times to enter strobe mode Mode Memory No Switch Type Reverse clicky Switch Location Head Application Seat Post Holder Diameter 2-4 cm Waterproof Yes Other Features Red light wavelength: 650nm; Built-in 500mAh battery voltage: 5V Packing List 1 x Taillight 1 x Mini USB cable (40cm cable) 1 x Holder 1 x English user manual