Diverse Lighting Modes: The white headlights have 4 lighting modes: constant high brightness, constant medium brightness, constant low brightness and strobe (activated by double-clicking the button); the red taillightshave 6 lighting modes: Constant High Brightness, Constant Medium Brightness, Constant Low Brightness, Slight Flicker, Medium Flicker, Strobe, Click the button to switch. USB fast charging: The 800MAH lithium battery is built into the front light, and the 540MAH lithium battery is built into the tail light. They only need an hour to fully charge. There is a hidden USB charging port on the sideof the device, which can be connected to a computer and other devices with a USB port for fast charging, thus avoiding unnecessary battery replacement. Lightweight/Sturdy/Waterproof: Bike Light set use the PC plastic case, so you dont have to worry about it being too heavy, it is suitable for both men and women. The USB interface is covered with waterproof silica gel anddustproof, combined with advanced IPX5 waterproof and dustproof technology, suitable for various weather conditions. Easy to Install and Remove: It is installed by high-elastic silicone mounting strap, which is very soft, easy to stretch, and can be easily loosened and fixed without tools. The light can be firmly fixed on the frame andthe backrest, suitable for all types of bicycles, very suitable for children and all cyclists. Bicycle rear lights Red bicycle tail light The taillight features 14 super bright LEDs, 6 brightness levels (high/medium/low brightness, fast/medium/slow flashing) and memory function. The maximum run time in low mode is 12 hours. Press onthe button to change the mode as you need and hold it for about 1 second to turn it off. Bright LED taillights make it easier to alert vehicles and pedestrians behind you. USB fast charging IPX5 waterproof rating Easy to install and remove PC plastic material, sturdy and durable Lightweight and safe, suitable for adults and children The front and rear lights of the bicycle light combination have USB fast charging function, no need to replace the battery, Convenient and economical. The lamp holder is easy to install and remove, and it can be done easily without tools. Whether walking a dog, biking, skating, hiking or motorcycling, these super bright safety lights can ensure yoursecurity. Packing list 1 x Bike Headlight (White Light) 1 x Bike Rear Lights (Red Light) 1 x Instruction Manual 2 x USB charging cable 2 x silicone rubber