If the subject of quest-rooms provides end of time or other resource or exploding dynamite, nuclear, biological or other bombs, a countdown timer or dummy bomb is an indispensable attribute.
Countdown timer and bombs made by our own hands, so they accurately repeat model the bomb. Timers and bombs look realistic, because they have all the necessary elements: clock, colorful rods, tubes with "explosive" and so on.
Start and stop the timer is made by the algorithm that You set. The rate and duration of any reference may vary depending on the situation.
In the complete set may include, if desired, timer or fake bombs, sensors, magnets, relays, electronic locks and others (depending on the specific task). The size and appearance of the casts can be varied.