SpyX DIY Listener - Make Your Own Spy Device Connect the circuits and build your own real working spy gadget & Learn the science behind SpyX Surveillance! Build your own spy listening device by following the included instruction & learn the science behind the spy gadgets Plug each sound amplifier modules into the base and connecting the wires, and turn on the power. Place the earbud into your ear, and point the microphone towards the sound source to hear secrets Creative STEM educational kit for kids to learn how to connect the circuits and build a real working spy gadget Promotes critical thinking, fine motor skills, problem solving, and cause/effect training The Includes: Base Spy Listener Kit (a microphones, a battery module, a volume knob, a listen module, an on/off switch, and a earbud) Metal Springs Instruction Sheet.. Specifications Weight: 0.57 lbs; .