IED Circuit Builder Kit is made of inert IEDs and IED Switches to training EOD officers on IED identification and disposal. The best way for learning is by doing. All simulated IEDs in this kit are provided in 6 separate modules: explosive, detonator, power source, switch, central circuit board and initiator. All modules are clear to see, flexible to take out and assemble. Once assembled correctly, the device will alert when triggered.