ProductionMaterial: PC lampshade +ABS lamp shellWeight: 45gSize: 6.5x3x2 cmLight Source: XPE 3W LEDLed power: 3WLumen: 300 lumenColor temperture: 6000kPower Source: 800mAh Li-Poly BatteryApplicable vehicle tube diameter: 20-40 mmCharging Time: Approx.3hoursDischarge time: Highlight 3 hour, low light 5 hour, shiny 12 hourLighting Distance: 30-50meters at nightWaterproof: IPX-63 Working Modes: High-Medium-StrobeRunning Time:High: 3 HoursMedium: 5 HoursFlashing: 12 Hours2. Tail light Features:Product specifications: 2x7.2x2 cmWeight: 25g3 LED Light color: Red, White, BlueMaterial: Plastic housing ModeWaterproof: IPX-44 Working Modes: Long Bright, slow flash, explosion flash and strobeHigh quality internal lithium battery,only need about 2 hours to be fullycharged while be used for about 12 hours.Long Steady Bright----2 HoursSlow Flash----10 HoursSuper Flash----6 HoursStrobe Flash----8 HoursPackage Include1 Set bicycle headlight & data cableor1 Set bicycle taillight&data cable& 2 Pcs rubber ringor1 Set of bicycle front light & tail light & 2 Pcs data cable & 2 Pcs rubber ringPlease Note:Some buyers find that the taillights cannot be turned on after receiving the goods, please follow the steps below:1. If you find that the tail light cannot be turned on, please charge the tail light first, and then try to turn on the tail light.2. If you still can't turn on the taillight after charging, please