[ADVANCED DESIGN]: USB rechargeable front and back light, built in 2000mAh rechargeable lithium battery for Headlight and built Waterproof rated to IPX5 - Protected against splashing water from any angle. [FOUR LIGHT MODE OPTIONS]: The Headlight and Taillight feature an one-touch switch with four different lighting modes depending on your preference. Include full brightness, half brightness, fast flashing and slow flashing. [360 free rotation]: 360 degree free rotation, you can watch the phone at the most ideal angle (horizontal, vertical or any desired angle) to make your journey more comfortable. The free installation makes it easy to connect to any possible cycle handlebar. [Wide Compatibility Wide Application]: it can be widely used in bicycles, strollers, treadmills, shopping carts and handlebars anywhere as long as you have a round bar. The universal bike mobile phone mount is suitable for mobile phones with size of 4~6.5.[MUTIFUNCTION]: This bike light set is versatile enough for cycling, hiking, camping, or any outdoor activity and can be used as emergency flashlight. This is great for cycling at night or in places where visibility and safety are concern. So, just start your next adventure with us.