3 Lighting Modes High - Low - Strobe, you can switch by simply clicking the button. 3 light modes allow you to adapt to different environment lighting needs. Save U Money Built-in rechargeable 18650 battery (Battery can be replaced), charge by USB interface. Which can be charged from any devices with a USB port. Waterproof & Safety Made of high-quality & IPX5-waterproof aluminum alloy, heat dissipation and corrosion resistance. Comes with a red light tail light, make sure can be seen by rear vehicle, never worry about night riding on city streets or country roads. Easy to Mount The LED bicycle light is easy to install and release without any tools, which can firmly fix the lamp in the frame and the rear of the bike, it is suitable for all type of bicycles. Versatile Use The bike lamp can be used as an emergency flashlight or other lighting tools,perfect for camping, hiking, caving, cycling, walking, running, power outage, BBQ, family night time,home, etc.