Sonic Alert SB1000C Classic Alarm Clock w/ Super Shaker Sonic Alert SB1000C Purchase Includes:One Sonic Alert Classic Alarm ClockOne Super Shaker Device Users Guide 5 year manufacturer warranty Sonic Alert SB1000C Features:Built-in Telephone Signaler113 dB extra-loud alarm with adjustable tone ; volume controlSS12V Super Shaker bed vibrating unitBuilt-in flashing alert lightsHi/low dimmer switch9V battery backup maintains time and alarm setting in the event of power failure (battery not included)