Specifications: Brand BIKIGHTLED5W LEDBattery Polymer battery 1200 m Ah Material Aluminum Magnesium alloy + PCSize 82 mm * 30 mm * 22 mm Peak Beam Intensity 3120CDCharging time 1-2 h Tail Light:LEDCOBBattery 900m Ah Material Aluminum magnesium alloy + PCSize 71mm*16mm*20mm Charging time 1h Usage: Double-Click ON/OFF button to switch modes. Press the ON/OFF button to switch brightness. Click ON/OFF button to turn on. Press the ON/OFF button for 3 seconds to turn off. Package Included:1 x Bicycle Headlight 1 x Rear Light 1 x USB (Universal Serial Bus) cable 1 x User manual