The Bicycle front light has a built-in 3600 mAh rechargeable battery. It takes about 3 hours to fully charge the headlight. There is a hidden USB charging port on the back of the device, which can be connected to a computer and other devices through the USB port for fast charging without changing the battery [5/6 light mode] There are 5 light modes for the bike headlight: highlight/medium light/low light/slightly bright/fast flash, double-click the button to start the mode flashing; bike rear light has 6 light patterns: high/medium light/ Low light/slow flashing/interval flashing/continuous flashing, long press the button for 2 seconds to turn off the bicycle light [Super bright mode] The front bicycle light has a super bright mode. Press and hold the switch for 1 second to turn it on. Release the button and it will automatically close. Super bright headlights will help you when you need it. Don't try to see with your eyes to avoid injury. [Light/weight/Sturdy/Waterproof] The headlights are made of one-piece aluminum alloy shell, which is sturdy and durable, with IP65 waterproof rating; the taillights are made of PC plastic shell, which is strong and durable, so don't worry about being too heavy. The USB interface is covered with waterproof and dustproof silica gel, which can better protect the charging port and effectively extend the service life. [Installation/Premium] The bike light is easy to install and disassemble. It can be done manually without the help of other tools, and it can also be done by children. The exquisite headlights are available in two different colors, black and pink. You can choose according to your preferences. It is also a good choice as a gift to a friend.