Disc or push-button phone is ideal for any quest-rooms, because it can be used as a substitute for conventional code panel and it can easily fit into any theme room and can be not only functional but also decorative addition to the scenario quest.
Disk or button phone can be one of the elements in the quest in reality, because there you can enter numerical combinations of different length and sequence. And in case the phone is easy to hide even several mechanisms.
The combination, which you need to enter is arbitrary - you can set any sequence, depending on what it should be in a particular quest-room.
After typing the correct number mechanism is working and giving a performance you need.
Complete set may include, if desired, disk or button phones, sensors, magnets, relays, electronic locks and others (depending on the specific task). The size and appearance of the phone may be varied.