The very sturdy disk phone is made of metal and plastic. A real old-school phone from the ship.
In this version of the phone, communication between the Game Master and the players is implemented using an intercom.
To contact the players, the GM must pick up the phone, the call will go automatically (a real mechanical ringing from the phone).
Players also need to dial a special number (programmable), and a GM call will go on: a phone call and an LED indicator.
The escape room marine phone puzzle consists of:
1. The players' phone
2. The GM's phone
3. A 20m (65 ft) long connector cable.

This Disk phone (marine version) Intercom is suitable for the following escape room themes: submarine, mine, bunker, military facility, old laboratory, etc.