Patent ID: 7266047

Claim:
An alarm device for use in combination with an alarm clock, comprising: a receiver for receiving a wireless alarm signal transmitted by an alarm clock; an operating circuit associated with the receiver for providing an operating signal in response to the receiver receiving the alarm signal; an electro-mechanical vibrator associated with the operating circuit for vibration in response to the operating signal provided by the operating circuit; and a casing including first and second shells housing, when joined together, the receiver, the operating circuit, and the vibrator, the first shell being vibrated by the vibrator to provide a vibrational alarm signal, the second shell including a surface on which an operating key or a button for controlling the operating circuit is exposed, and an outer cover attachable to and completely detachable from the second shell, covering the operating key or a button when the outer cover is attached to the second shell so that the casing has an outer surface enclosing the alarm device and free of any exposed operating keys and buttons for controlling the alarm device.