Ballistocardiography is how dozemate gets information about your heart, lungs, and most of the other organs in your body using vibrations from your movements while you sleep. dozemate device sensors work just with the device tucked discretely. Continuously picking on the tiniest vibrations from your heartbeats, breathing, tremors, seizures, and even how you change positions in bed – all without touching you! It's like having a secret health detective under your bed!