This SOS / assistance button is a compact, portable device designed to alert people outside the home when assistance is needed. Very important for elderly people living alone. Simply press the large, easily accessible button to send an instant distress signal. The alert sends a Zigbee signal to the gateway, which transmits it to the server. A push notification is then sent to the connected phone. Supplied with cord. There are no monthly or recurring charges associated with this device. The assistance button can be integrated into the application. Nedis SmartLife is the connector and Smartlife the gateway installed in your home. The assistance requests will be sent to your loved ones via this gateway and via the application.