Weather-Resistant Handsfree Doorbox, Impact Resistant UV Stable Plastic Chassis, Ash, Surface Mount. Now you can answer your door or gate from the safety of your telephone! The W-1000 (flush mount) and W-2000A (surface mount) doorboxes are designed to be installed on the unused telephone line input of nearly any phone system. One or two doorboxes can also share an existing residential phone line and provide door strike and CCTV camera control when used in combination with a C-1000B doorbox controller. When the Call button is pressed, the doorbox generates a standard ring cadence for an adjustable number of rings. To converse with the visitor, the inside party simply answers the call from the phone of their choice. For outdoor or harsh environments, the W-1000 and W-2000A are available with Enhanced Weather Protection (EWP). The W-1000-EWP and W-2000A-EWP 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 Applications Residential and Business door security Gate communication Communication with truck stop/gas station fuel islands Communication with delivery and employee entrances Use with Viking's C-1000B, RC-2A, or RC-3 to operate electronic door strikes Features New high output speaker amplifier with volume adjustment POT Microphone volume adjustment POT 24 volt talk battery 20 Hz ring generator (3.0 REN ring load maximum) Selectable number of rings (2, 3, 10 or 30) Extended operating temperature range: -15F to 130F Compact 45 terminal strip for easy wiring Optional Enhanced Weather Protection One year warranty Made in the USA.