[Headlight] The headlight uses 2 high power SAMSUNG LH351B LEDs producing 200 lumens with 4 unique brightness levels (high, medium, low, strobe) and memory function. Low mode has a battery life of 10 hours. You can switch the mode according to your needs by clicking the button and turning it off by holding it for about 1 second. Front bike light illuminates to illuminate the road ahead of the bike. [USB rechargeable battery] saves you money on batteries every time. With a built-in rechargeable battery of 800MAH for the front light and 540MAH for the rear light, it only takes one hour to fully charge them. A hidden USB charging port on the side of the unit can be connected to computers and other USB port devices for quick and easy charging, saving unnecessary battery changes forever. < p>[The USB rechargeable bike light requires no tools and the head is easy to install and remove, whether you're walking your dog, riding a bike, skateboarding, hiking or motorcycling, these safety lights super bright will keep you safe. [The USB port is covered with waterproof and dustproof silicone, which can charge the bike lights better and extend their life life. [Taillight] The taillight is equipped with 14 super bright LEDs with 6 brightness levels (high/medium/low brightness, fast/medium/slow flashing) and memory function. Runtime up to 12 hours in low mode. Long press for about 1 second to turn off the rear light and give you 360 protection by attracting the rider behind you with your LED bike light.