ZDD DURABLE USB RECHARGEABLE BATTERY - A built-in 750mAh lithium battery makes these LED bike lights super bright in the dark. A 3-hour full charge gives you 6+ hours of continuous use, allowing you to avoid unnecessary battery replacements forever. They can be charged using any device with a USB port (PC/portable charger/wall charger/etc) and include overcharge protection. Definitely the best USB bike light for bike lovers Four Lighting Mode Options - Both the white front light and the red rear light support 4 light modes: constant full brightness/constant half brightness/strobe/strobe. With the click of a button, you can switch modes as needed. Illuminate the road ahead of your bike with bright headlights and alert drivers approaching from behind with the bikes LED taillights, giving you 360-degree protection. SECURE MOUNTING - Advanced and flexible silicone mounting straps provide great security, holding the USB rechargeable bike light set tight enough to prevent it from falling off, even on rough roads. They can be easily loosened and secured without any tools. Fits all kinds of bikes like kids bikes/road bikes. WATERPROOF AND LIGHTWEIGHT - The fully enclosed design protects the bike light set from rain, even the USB port is fully covered for easy use in all weather conditions. The lightweight and strong shell guarantees stable performance, which is very important when you are riding on difficult terrain. RISK-FREE SHOPPING EXPERIENCE -- We firmly believe that bike lights are the best choice for your everyday riding. Number of pieces shipped: 1 set Product color: as shown Product size: 5.4*4.2*3.7cm