DAYTIME LIGHT TECHNOLOGY- The Bike-light features the latest LED technology which will keep you visible at night and also during the day. USB RECHARGEABLE FRONT AND BACK LIGHTS-No need to waste money on batteries again. The front and backlights are fully USB rechargeable and come with a USB CABLE for easy charging from the computer, laptop, power bank or any device with a USB port. The has an automatic fully charged cut-off system function ensuring safety and longer battery life. INSTALL IN SECONDS - NO TOOLS REQUIRED-The Bike-light is equipped with a mounting bracket that can be easily fixed to the handlebar. The clips on easily and stays on securely and also clips off easily to use as a multi-purpose torch. The silicone mount strap for Taillight is designed to tightly fit around most size seat posts. Both Headlight and Taillight can be easily be fitted and removed, no tools are required. BUILT IN RECHARGEABLE POWERBANK-Front bicycle light is more than just a bike light, it can also be used as a power bank. If your phone battery is running low and you need a quick boost you can charge your phone while riding or you can use it to charge your phone wherever you are. With a built-in 2400mAh/5200mAh rechargeable battery it will provide plenty of juice when needed. L2:960lm T6:1050lm Products from GuanGuan's store