Shake N Wake Vibrating Alarm Clock w Dual Alarms This is an alarm clock used by a deaf person, the disc is placed under a pillow or mattress to wake you up : r interestingasfuck Amazon.com: Mesqool Vibrating Alarm Clock for Heavy Sleepers, Battery Operated Rechargeable Bed Shaker Under Pillow, Wireless,Vibration Adjustable, Dual Alarms, Travel Portable Digital Clock for Hearing impaired : Home & Kitchen Loud Vibrating Alarm Clock for Heavy Sleepers Jolliman Wristband Extra Strong Vibrating Alarm Clock Sweatband, Silent Wake Yo JUNELILYBEAUTY Alarm Clock Vibrator