Super Loud Alarm Clocks for Heavy Sleepers Adults】Designed with heavy sleepers and individuals who struggle to wake up in mind, this clock features a unique ringing mechanism. A battery-powered small metal hammer strikes the metal bells at a rapid rate, creating a powerful, resonant tone that reverberates through the room. Even the heaviest sleepers will be immediately roused by the clear, loud, and crisp sound produced by this mechanism. With no snooze button to tempt you back to sleep, this alarm ensures that adults, teens, children, and the elderly rise and greet the day with vigor.