The SunDing SD-558A bike computer is mounted on the bicycle handlebar and includes a LCD display and three control buttons. The casing is made of plastic, and the set includes a cable connecting the sensor to the computer, enabling wired data transmission. The device measures and displays speed, distance, riding time, and has a stopwatch function. The computer is waterproof, allowing use in various weather conditions. Installation is tool-free, and operation is managed via buttons on the casing. Product specifications: wired bike computer SunDing SD-558A, backlit LCD display, three control buttons, waterproof casing, sensor cable, stopwatch function, tool-free installation.