Description: The Hal-Hen Pillow Vibrator is designed to be tucked comfortably under a pillow while allowing the user to sleep. When plugged into the back of alarm clocks incorporating AC outlets, the unit will gently awaken a hearing impaired individual. Superior quality construction. Safe 12 V design, plugs into standard 110 V power source. Economically priced. Related Items: 2740-N Hal-Hen Deluxe Alarm Clock 2737 Hal-Hen Strobe Light 2810 Hal-Hen Deluxe Alarm Clock and Pillow Vibrator 2744 Hal-Hen Deluxe Alarm Clock & Strobe Light Combination