The functions of each wire of the Defusable Alarm Clock changes randomly every morning so users must distinguish between the two redundant cables and the fourth which triggers a series of flashing LEDs.
Designer Michael Krumpus was inspired to make the clock after seeing bombs feature in Hollywood films.
“I thought it would be fun to build an alarm clock that looks just like the type of bomb that we always see in Hollywood movies,” the Daily Mail quoted him as saying.
“I certainly don’t know anything about how a real bomb might look but in the movies they always have sticks of dynamite strapped together, a red digital readout and a bunch of curly wires.
“Instead of just building an ordinary clock, I thought it should have a detonation sequence with a scary countdown just like in the movies.
“And why not make it ‘defusable’ so I an try to stop the countdown by cutting the correct wire?” he said.
The clock is so realistic that the 41-year-old had to put a message on his website telling security services that it is not a real bomb.
“Dear Federal Agents and other Law Enforcement, this is only a clock. It is no more dangerous than any other clock.
“I don’t know anything about explosives beyond what I''ve seen in movies.
“So, if you are with the FBI, Department of Homeland Security, CIA, ATF, Department of Defense, National Counter-terrorism Center, Interpol, or SEAL Team Six, please know that I am on your side!
“So, we’re cool, right?” he said.
The clock, which costs 27 pounds, is available to buy on the internet. Alternatively, people can buy the parts from the same site and make it themselves.
“By using your imagination, you can build a clock that looks like a dangerous device.
“For example, phony dynamite can be made by wrapping brown paper around wood dowels,” he added.