When you're a hard sleeper, waking up is the hardest thing to do with a normal alarm clock. The Sonic Boom Analog Alarm (sold separately) assures that you'll wake up, and a Sonic Boom Clock Vibrator Extension Cord assists in waking you up. Featuring 15 extra feet of power, the vibrating mechanism on your Sonic Boom alarm clock can reach a total of 22 feet! Perfect for allowing placement-- under a pillow, beside you, perhaps even near your feet! Whatever you choose, the vibration in addition to the extra waking tools on the Sonic Boom Analog Alarm easily make it the best alarm clock for deep sleepers.