At night, the pager gets plugged into this device which recharges it. There is also a vibrator plugged into it that sits under her pillow, so if any of the transmitters go off at night she is woken up by her pillow buzzing madly. Even before she lost her hearing, Lori could sleep through most alarm clocks going off, but the vibrating pillow is very effective. So that’s the full tour of the Silent Call system.