Aiphone Very Easy To Install Intercom System

Basic system (no lock open button) installs with the same wires you use for a bell. Features include:

Seperate chime and communication volume controls

Back-lit call button

Uses the same 12-16 volt AC transformer now being used by door bell

Specifications
Power Source	12 ~ 16V AC transformer, 10VA (w/no-load voltage rating: 20V or less). Use PT-1210N plug -in tranformer (12V AC) or PT-1610 hardwired 16V AC transformer (16V AC)..
Communication	2-tone chime. Press TALK to reply. Hands free at door. Times out in 15 seconds after TALK is pressed.
Wiring	2 wires, parallel, shielded, non-polarized.)
Distance	245' with 22AWG, 590' with 18AWG.