Error Instruments Zapper Converts electromagnetic wave noise into sound. A cool device with a Joy Division-esque design. You can capture the invisible electromagnetic waves around you and discover interesting sounds. It's said to be influenced by SOMA Ether and Lom, with added spice. Two external input terminals and volume knobs each 3.5mm stereo out terminal 9V center-positive adapter compatible Mobile operation possible with batteries Includes only the silver drawstring bag and the main unit. The main unit has almost no damage, but the included drawstring bag has some scuff damage. Please check the images. For sound designers and experimentalists who want to listen to electromagnetic fields.