Battery telephone 1:3 nonwater, proof built-in odc-2782-1k

This equipment utilizes the ship’s power supply of 24 volts DC to activate the voice communication circuits. With a press of the quick access button, you can communicate with the opposite party. 1:2 and 1:3 Communication systems Two or three extensions can be connected to a main telephone set. The extension set can be contacted by pressing the push button at the main telephone set. The main set can be contacted by simply lifting the extension handset.