Pocket Sized RFI Detector from MFJ. This Ultra Sensitive RFI Detector is perfect for tracking down and eliminating RFI caused by radiating cables and wires. It isolates cables picking up RFI and indicates when you've suppressed it.
. Small Enough to Fit in a Shirt Pocket and Easy to Use
. Power Source - 9 volt Battery (Not Included)
. Usable from VLF to VHF
. Gain Adjustable over 50 dB Range