Fast USB Charging: The front and rear lights of the bicycle lighting set feature built-in 540mAh rechargeable lithium batteries. Fully charges in approximately one hour. Simply connect to a computer or any USB power port for fast charging. No need to purchase or replace batteries. 6 Lighting Modes: The front and rear lights offer 6 lighting modes: High brightness, medium brightness, low brightness, rapid flash, slow flash, and warning flash. Cycle through modes with a simple press of the button. Lightweight and easy to use. IPX4 Water Resistance: The USB charging port is sealed with IPX4 waterproof material and silicone to protect the internal components from rain and moisture. Provides strong environmental sealing, effectively extending the lifespan of the bicycle lighting. Durable and Compact Design: The housing is made of durable PC plastic. The front white light and rear red light measure 33 x 25 mm and weigh only 20g, making them lighter than most bicycle lights. Can be installed on any part of the bike without risk of damage. Easy to Install: The package includes 4 flexible silicone mounting straps, suitable for bicycles of various sizes. The silicone straps allow for quick and tool-free installation and removal, making it convenient to mount or take off. Product Description: 6 Lighting Modes: The bicycle front light offers 6 modes: High brightness (3 hours continuous use), medium brightness (6 hours), low brightness (12 hours), slow flash (10 hours), rapid flash (12 hours), and warning light (10 hours). Press the button to cycle through modes and hold for 1 second to turn off. Operating voltage: 2.7V–5V. Current: 0.3A. Charging time: Approx. 1 hour. Front Light: The white front light features 12 super bright LEDs, 6 brightness levels (high/medium/low, fast/medium/slow flashing), and a memory function. Maximum runtime in low mode is up to 12 hours. Press the button to change modes as needed, hold for 1 second to turn off. Bright LED headlights provide a wider field of vision for safer riding. Fast USB charging, IPX4 water resistance, easy to install and remove. Made of solid and durable PC plastic. Lightweight and secure, suitable for adults and children. Rear Light: The red rear light also features 6 modes: High brightness (3 hours), medium brightness (6 hours), low brightness (12 hours), slow flash (10 hours), rapid flash (12 hours), and warning light (10 hours). Press the button to change modes and hold for 1 second to turn off. Voltage: 2.7V–5V. Current: 0.3A. Charging time: Approx. 1 hour. The rear light has 12 super bright LEDs, 6 brightness levels (high/medium/low, fast/medium/slow flashing), and a memory function. Maximum runtime in low mode is up to 12 hours. Press the button to switch modes and hold for 1 second to turn off. Bright rear LED lights increase visibility and help alert vehicles and pedestrians behind you. Fast USB charging, IPX4 water resistance, easy to install and remove. Durable PC plastic construction. Lightweight and secure, suitable for adults and children.