If you're a very heavy sleeper, you already know a regular alarm clock usually doesn't get the job done, and phone alerts or easygoing sunrise alarms don't rouse those who are deep in an REM cycle, ...

If a standard alarm clock falls short, try options with bed shakers, extra-loud alerts or runaway designs that make hitting snooze much harder.

Sharp model SPC445 travel alarm clock. “Sharp”, “Creative”, “Apr/11”, “Sharp / SPC445 / Made in China”. Unit used a CR2032 battery. overall: 4 in x 2 in x 1/2 in; 10.16 cm x 5.08 cm x 1.27 cm ...