Front LightThe front lights Utilizes 2 SAMSUNG LH351B LEDs, high-powered produces 200 lumens with 4 unique brightness levels (high, medium, low, Strobe) and Memory Function. The operating time in low mode is up to 10 hours. You can click the button to switch modes as you needed, double click to flashing mode, long click about 1 second to turn off.The front bike lights to illuminate the road ahead of the bike. Rear LightThe rear light has 14 ultra bright LED with 6 unique brightness levels (high/medium/low brightness, fast/medium/slow flashing) and Memory Function. The operating time in low mode is up to 12 hours. You can click the button to switch modes as you needed, long click about 1 second to turn off. The taillight, through your bicycle LED taillights to attract drivers from behind, so as to provide you with 360 protection. USB Rechargeable BatterySave your money on batteries again and again. The front light has a built-in 800MAH rechargeable battery, the rear one 540MAH, they only take 1 hour to be fully charged. There is a hidden USB charging port on the side of the device, it can be connected to a computer and other USB port devices to charge quickly, which facilitates charging and prevents unnecessary battery replacement forever. Easy Install & RemoveClips on easily and stays on securely. The USB-rechargeable front bike light is no tools required, light head is easy to attach and remove, whether walking your dog, cycling, skate boarding, hiking, motorcycle, these ultra-bright safety lights will keep you safe. Durable IPX5 waterproofCombined with advanced IPX5 waterproof and dustproof technology, it is suitable for all weather conditions. USB interface is covered with a waterproof and dustproof silicone, so that the bicycle lights can be better charged, prolonging its life effectively.