Accessory to the DigiScan EX. Extends its functions by adding posibility to scan the very low frequency range (VLF) on different wires going out of the checked premises. These frequencies can be used by different bugging devices so that the acoustics is transmitted through any wire out of a room or building. The converter converts the VLF range up to the range covered by the receiver and performs voltage regulation — this enables the receiver to process and demodulate VLF signals.