The Guardian Alert 911 Personal Emergency Response System is the world"s first personal emergency response system (PERS) that contains two-way voice communication in the pendant. By pressing a single button, the Guardian Alert 911 automatically dials local emergency 911 dispatch. The user will be able to communicate directly to the emergency operator through the pendant. There are no monthly fees associated with the Guardian Alert 911. Once the unit is plugged into a power outlet and working line it is ready to use. The pendant operates off of a battery for up to one year of stand-by time. The pendant has extended range allowing coverage in and around the home · Two-way voice communication in cordless pendant · Water resistant pendant · System test and battery test functions · Audible confirmations through pendant during dialing, shutdown, and system tests · Auto Standby after 4 minutes of inactivity · Pendant powered by AAA Alkaline battery · Package Includes¦ Base Station, 7’ phone cord for the base, AC adaptor, Lanyard, Belt Clip for pendant, AAA Alkaline battery