The uniquely styled Sonic Boom SBT425SS was designed to be a cost-effective bedside alarm clock. It also has a built-in telephone signaler that will alert you when the telephone it is connected to is ringing. Other features include a powerful, 12V bed shaker, hi/low dimmer switch for the clock display, built-in flashing lights to alert you to the telephone and alarm, and a battery backup in case of power failure.