Color: red + whiteLamp beads: 3 LED lightsMaterial: aluminum alloy plus engineering plasticsPackaging: exquisite compression-resistant plastic packaging.Durable USB Rechargeable Battery-Built--in 650mAh lithium battery makes these LED bike lights super bright in the dark.Fully charged in 3 hours and lasting over 6 hours, allowing you to avoid unnecessary battery replacement forever.They can be recharged with any device featuring USB ports (PC/ Portable charger/ wall charger/etc) and include over-charge protection.Absolutely the best USB bike lights for cycling enthusiastsFour Light Mode Options --Both the white front light and red rear light support 4 light modes: Constant Full Brightness / Constant Half Brightness / Blasting Flash / Stroboscopic. By simply clicking the button, you can switch modes as you wish. Light up the road ahead of your bike with a bright headlight and call attention to drivers approaching from behind with the bicycle LED taillight, giving you 360 degree protection.Fully enclosed design to protect the cycling light set from rainy days, even the USB port is completely covered, making it convenient to use in all weather conditions. The light weight and sturdy shell guarantees stable performance, which is very important when you ride on complex terrain.