Material ABSBattery: Built-in 1000 mAh polymer batterySwitching mode: 3 modes: white light-red light-white light and red light flashing alternatelySwitch: Press the switchCharging method: USB chargingFeatures: compact and lightweight, red warning light, front light and tail light, gear synchronizationCharging port indicator, red light when charging, green light when fullCharging time 2.5 sBattery life 2-3 s