Size:14*10*4cm HIGH BRIGHTNESS & HIGH CAPACITY BATTERY-1200 Lumen super bright headlight creates wide and smooth beam pattern, visible up to 650 feet,wide 120light angle,evenly illuminates from your tire all the way to where your eyes are looking.This headlight built-in 5200mAh high capacity USB reachargeable battery,providing amazing long run time of 5 hours on high,11 hours on low.Long run time means longer rides,and more confidence you wont be running out of Power at the worst moment USB RECHARGEABLE & POWER BANK FUNCTION-Both bike light front and back are USB rechargeable,no need to waste money on batteries,als more environmentally friendly.The headlight built-in overcharge and over discharge IC to extend the battery life.When power is less than 20%,the Power indicator turn red to alert you to charge it timely,avoiding push into darkness suddenly.Conveniently recharge from any USB port.adapter.Can be a Power Bank,you can use it for emergency charging when you're outdoors. WATERPRROF &IMPACT RESISTENT-Protected against small rain, Splash water,light up your road in all conditions of weather This Bicycle Light Constructed with aluminium alloy material and Anodized Finish,Make it with strong impact resistance and good heat dissipation.It can handle the shake and bump from bus rides & bumpy roads fine.Don't need to worry about stop working during your riding. 360SWIVEL STRONG MOUNT & EASY TO USE-The front bicycle light can rotate 360.When you rotate it at a fixed angle,it will stay in that position,it won't rotate more,unless you rotate it again.Features One Touch Quick Release Button,press and slide the light out without removing the whole mounting bracket,mount and detach in just seconds without tools When you lock up your bike outside,You can easily remove it for charging and theft prevention.Products from Chunchuan's store