That's the Expository Countdown Timer. Those kinds of products can be found in many TV shows and movies. Available options include a ticking countdown sound, alarm shortly before detonation, and a whirring sound that increases in frequency as the countdown timer winds down. Limited-edition versions include a special wiring harness of nothing but blue wires.
Other examples of the Expository Corporation's product offerings:
- Expository Corp. LEDs can be found on a cobbled together hand phaser in Star Trek: Because even when you're stuck with ancient technology and limited resources and a severe time limit, you still need to accessorize it to show that it's functional and really futuristic.
- Exposi-Sim General-Purpose Simulation software in Stargate Atlantis, with the Hypothetical Quantum Astrophysics addon package. The GUI simply says "Simulation Running..." and then "Simulation Failed." Most software simulation results can require extensive analysis to determine if they are even usable. Exposi-Sim delivers easy results that require only basic literacy to understand.
- Telephones which automatically prompt a person to repeat what they just heard so that anyone within earshot will know exactly what is being discussed. ("Repeat what you say to provide exposition?")