Use this indoor button to put your EZVIZ sensor system in action in a second, and leave home with peace of mind. Or, give it to the seniors or kids who are home alone, so they can get help if they need it. In addition to apps or voice controls, you can now use this simple smart button to switch on and off your entire EZVIZ sensor system, or press it to send an emergency alarm. It's mini-sized and battery-powered to go anywhere within your reach.