Sonic Alert SB1000 Sonic Boom Loud Vibrating Alarm Clock with Built In Receiver With Bed Shaker INCLUDED in Bundle: Sonic Bomb Bed Shaker and Sonic Boom Loud Vibrating Alarm Clock Vibrator can produce steady or pulsating vibration Complete with a loud 113db adjustable tone and volume Built-in receiver works with telephone and doorbell signalers (Models SA101, SA201, RH100, BL300, Sonic Boom Alarm Clock) Built-in 120 volt outlet for lamp - Battery backup to maintain the proper time in the event of a power outage