Viking C-500 Two Door Entry Phone Controller with Call Forwarding and Door Strike ControlsC 500 Features: Allows single line telephones or a telephone system to share a phone line with two Viking entry phones Double and triple distinctive ringing, programmable entry phone Caller ID or beep tones allow you to distinguish front and back door entry calls from CO calls Stackable connect up to four C 500s to control up to eight entry points Built in five number dialer (if inside phone doesnt answer), detects busy or ring no answer and goes on

SA-TBA Features:

Electronic warble (traditional loud ringer)

Drive up to (30) 8 ohm speakers at full power or up to (50) 70 V speakers

Push Button Lock is available to keep any VE-Series phone box locked

Amber lens: 242 lumens

Remote Access To:

an armored cable

Housed in convenient wall mount enclosure

Viking HF-3W Specifications:

Provide commercial or residential security via two-way handsfree communication at the door and gate

Weather resistant gasket included

Privacy Exclusion Device- Accesses the telephone line first by denying other Teleguard equipped devices access to the line until the call in progress has been terminated