Sonic Alert Analog with Super Shaker: * 113 db extra-loud alarm * Adjustable tone and volume control * Super Shaker bed-vibrating unit * Sharp blue backlight flashes when alarm rings, also functions as a convenient night light with an on/off switch * Hi/low dimmer switch * 1 AA battery backup, maintains time and alarm setting in the event of power failure (battery not included) * Dual power capability * 1-year warranty * Model# SBA475ss