| UHF RF Bugging Equipment (NFM) is various RF transmitter bugs purposed for eavesdropping (audio monitoring). These crystal clocked mini transmitters works in frequency band 400 MHz - 460 MHz with a narrow band frequency modulation (NFM) and requires a dedicated surveillance receiver, but offers greater penetrating power and privacy over the regular VHF mini transmitters. These listening devices are designed to professional use. The use of eavesdropping bugs, called bugging, is a common technique in surveillance, espionage and in police investigations. |
