The Rockbros R7 is a smart synchronized rear bicycle light designed to increase rider visibility across road, mountain, and urban cycling environments. It features five lighting modes and integrates intelligent sensors that automate your safety; the light turns on automatically when you start riding and enters sleep mode when parked, while an ambient light sensor activates the LEDs in low-light conditions. To alert drivers during deceleration, the brake sensing feature triggers a high-visibility warning for three seconds. This model utilizes synchronized flashing technology, allowing it to connect with other compatible lights within a 50-meter range for a unified signal. The device is powered by an integrated 600mAh rechargeable lithium battery that charges via a USB-C port in about two hours, with a built-in indicator to track remaining power and charging status. Its plastic housing is rated IPX6 for water resistance and comes with rubber mounting supports, giving you the choice to attach it either to the saddle rails or the seatpost.