Abstract: A vibrational alarm device for use in combination with an alarm clock, includes a receiver for receiving a RF alarm signal transmitted by the alarm clock, an operating circuit for providing an operating signal in response to the receiver receiving the alarm signal, and an electromechanical vibrator for vibration in response to the operating signal provided by the operating circuit. A casing houses the receiver, the operating circuit, and the vibrator for vibration by the vibrator to provide a vibrational alarm signal.