The Viking K-1700-3EWP Handsfree Entry Phones with Built-In Keypad & Enhanced Weather Protection (Stainless Steel) provides a tough and attractive handsfree phone for apartment and residential door entry or applications requiring a vandal resistant speaker phone. When the "Call" button is pressed, the K-1700-3EWP returns dial tone. The keypad may then be used to dial any number. If no Touch Tone is entered within 8 seconds, CPC is detected, a busy signal is detected, or the programmable maximum call time has elapsed, the K-1700-3EWP will automatically disconnect. Alternatively, the K-1700-3EWP may be disconnected by pressing the "Call" button again. It feature rubber gaskets and boots, closed cell foam gasketing, hand soldered silicon sealed connections, anti-corrosive gel filled butt connectors, as well as urethane encapsulated circuit boards with internally sealed, field-adjustable trim POTS and DIP switches.