By slipping this pocketsized alarm clock inside your pillowcase or under your mattress, it's powerful vibrating alarm will "Shake Awake" even the soundest sleeper! The Shake Awake is a better way to greet the day for: The "Morning Impaired", Hearing Impaired, Sleepmates on Different Schedules, Busy Travelers, College Roommates, Snoozing Commuters, & Sleepy-Headed Teens. Simply choose the vibrating or audible alarm, then clip onto your pillow case, or under your pillow or mattress. The powerful vibration or loud audible alarm will awake even the soundest sleeper.