Cocoon is a single device that uses SUBSOUND™ Technology to sense activity throughout your home. There’s no need to set it when you come and go and it learns what’s normal for your home to avoid false alarms. If Cocoon senses something wrong it sends high quality video straight to your smartphone so you can take action and feel safe. Coming home late or getting up in the middle of the night - Cocoon lets you know that you're safe before you open a door. Working late? Take a moment to check in on the kids, or your pooch - Cocoon helps keep them and you out of trouble, all from your smartphone. Cocoon automatically protects your family so there's no need to set it when you leave for work or go to bed.