ht bicycle tail light Colour: Black Lamp beads: LED+SMD (red/blue) Charging method: USB charging Use battery: built-in polymer lithium battery Battery capacity: 800 mAh Charging time: 3 hours Working time: 1-2 hours Lighting mode: 5 levels adjustable (main light: white light strong light / white light low light; secondary light: red and blue flashing / white light strong light / white light weak light) Waterproof grade: life grade waterproof (not immersed in water) Maximum range: 100-200 meters Size: 7*2.5cm Gross weight: 43g