1. Comes with a set - The bike lights front and back making your bike stand out with unmatched 360° visibility, ensure your in the dark. You can hold the ON/OFF button 3 seconds to open the anti-theft mode, which gives the bike headlight additional security. And there is an useful bike horn, you can easily press the button to warn the others when emergency. 2. Lighting Modes & Improved - You can easily cycle through the 3 lighting modes( brightness, 50% brightness, strobe) of the bike light by pressing the ON/OFF button. The rear light also have 2 lighting modes (high, strobe). A 1400 Lumen bicycle lights front and rear that uses the latest LED technology will illuminate your path and keep you visible during both night and broad daylight and a red taillight with wide-angle beam which can be seen from blocks away. 3. Fast Charging & Performance - This bike headlight is powered by a built-in 1200mAh rechargeable battery, you can charge the bicycle headlight by the USB charging cable (included). This rechargeable bike light only takes 3 hours to fully charge, and the battery can ensure you use up to 3 hours in brightness mode. 4. Easy to Install & Carry- bicycle lights front and rear take just seconds to mount without any tools, wires or screws accessories. In addition to fitting all standard bicycles, bike lights front and back are also suitable for scooters, strollers, and wheelchairs. Total weight of bike headlight and tail light set is only 4oz ,making them portable and used as normal flashlights.