Item DescriptionFeatures: USB rechargeable can be charged via PC USB or wall adapter.Built-in 3pcs super bright led. 4 Modes: High brightness/half brightness/quick flashing/slow flashing. Easy to install with the elastic rubber strap, no tools required, can fit all kinds of bikes, and can be mounted on any position of the bike. Make riding safe day and night, the super bright white headlight clears your way, the alarming red taillight makes you noticeable, and no need to worry about being knocked over by others. Great for avid riders, road or mountain bikers, kids, and even runners. High quality, well constructed, strong, and durable.Specifications:-LED Quantity: 3 LED-Lumen: 160lm-Waterproof: IPX4-Battery: 2 x 3.7V/650 mAh-Charge Time: About 2-3hrs-Discharge Time: 3hr (high brightness), 5.5hrs (half brightness), 5hrs (quick flashing), 3.5hrs (slow flashing)-Size: 45 mm x 45 mm x 35 mm-LED Life Span: about 10000hours- Color: Red white - Material: Aluminium alloy, Plastic.- Size: About 4.5 * 4.5 cm/ 1.77 * 1.77 inch(L*W).- Features: 4 Light Mode Options: Full brightness, Half brightness, Slow flashing, Fast flashing. - Battery: 650mAh rechargeable lithium battery.- Waterproof: IPX4What's included:1 X Head light (white light)1 X Tail light (red light)2 X USB cables2 X Silicone mounting Strap