The ROCKBROS Q5 is a smart bicycle rear light designed to enhance your visibility and safety on the road. It features a high-lumen COB LED that delivers 60 lumens of brightness, housed within a CNC machined aluminum alloy 6061 body and an optical PC lens for durability. To keep you safe during sudden stops, the integrated high-precision deceleration sensor automatically switches the light to maximum brightness when it detects braking. Managing power is effortless thanks to built-in light and motion sensors that activate the lamp when you start pedaling in dark conditions and turn it off after 30 seconds of inactivity. The 400mAh rechargeable battery provides between 5 and 8 hours of runtime in dimmer mode, while four blue indicator lights let you keep track of the remaining charge before plugging it into a USB cable. Weighing approximately 55g, this lightweight accessory is built to withstand rain and splashes with an IPX6 waterproof rating. You can easily attach it to your bike using either the included silicone strap for the seatpost or the dedicated rails for the saddle, making it a versatile choice for cyclists who want a reliable, automated lighting solution.