[Features] ●It is a hybrid radio clock that can receive the time from a standard radio wave or a smartphone application. ●Temperature/humidity display, sweep second hand, sleep second hand, and low battery warning function. -Since the clock itself has the functions of "parent device", "child device" and "relay device", it is possible to synchronize the time by installing multiple units if the environment is in place. ● Connect clock information from clock to clock via Bluetooth.