Pursonic Chair Cushion With Heat and Vibration Back Massager With Heat For Pain Relief, Back Massage Chair Pad, Chair Massager For Full Body Heated Back Massager for Chairs 8 Vibration Motors & Pain Relief Stop, mute, and change message notifications on iPhone Apple Support (AU) Cell phones vibrate using a small motor with a weighted disc that spins quickly. As the disc moves, it creates tiny shakes that you feel as a vibration. This helps you get alerts without sound. The