The ROCKBROS REX01 is a smart rear bicycle tail light designed to increase rider visibility and safety through integrated automation. It delivers a brightness of 85 lumens and features a built-in brake sensor that automatically triggers a two-second warning light whenever you slow down. To help you communicate with other road users, the system includes a wireless remote that allows you to activate turn signals from your handlebars within a range of 1.5 meters. Constructed from a durable blend of ABS, polycarbonate, and rubber, the light is IPX6 water-resistant, making it reliable during rainy rides. It is powered by a 500mAh rechargeable battery that provides up to 34 hours of use and charges via a USB Type-C port, which includes indicators to show the current battery level. The device mounts securely to the seat and manages power efficiently using a vibration wake-up function and an automatic sleep mode. For those who commute through varying environments, the light-sensitive sensor automatically activates the lamp when entering tunnels or riding in darkness. With five different lighting modes to choose from, this setup is well-suited for urban cyclists who need a hands-free way to signal intentions and maintain a constant presence on the road.