This is a commercial-grade desktop phone, auto dials pre-programmed number (e.g. 911) when handset is lifted off. 

Specifications:

▶ Works on any analog phone line (PSTN, VOIP) that is FSK or DTMF compatible

▶ Telephone line powered

▶ Weight: 3.1 lbs

▶ Easy to install and program

Applications: 

▶ Emergency phones

▶ Medical Alert phones

▶ Emergency elevators

▶ Use with courtesy phones in airports, airlines, hotel lobbies, car rentals, etc.