Featuresr 2pcs super bright leds give out extra bright light that allows you easily to be seenr 3 modes high brightness low brightness flashr built in 580mah rechargeable lithium batteryr rapid usb charging only takes 3 hours to full charge from your device with a usb portr long using time 4 hours in high brightness 6 hours in low brightness 8 hours in flash moder silicone straps can be used for different bicycles suitable for 70mm handlebar diameter or less