The ROCKBROS AI Q0 is a smart LED rear light designed to keep cyclists visible and safe during urban commutes or trail rides. It features an integrated accelerometer for auto brake sensing, which increases brightness when you slow down, and sensors that automatically trigger the light based on vibration and ambient light levels. This means the device can start and stop on its own, saving you from manual adjustments while riding. Built with a lightweight chassis of plastic and aluminum alloy, the unit weighs as little as 22g and carries an IPX6 waterproof rating, ensuring it remains functional during heavy rain. You can choose from several lighting modes, including constant, flash, breathing, and SOS, to suit different visibility needs. The internal Li-ion battery is rechargeable via USB, and the package includes versatile mounting brackets for either the seatpost or seat rails, making it compatible with most road and mountain bikes.