Radio Frequency (RF) Bugs can be concealed and installed in installed in just about anything imaginable, from a pen or calculator to a mains socket/adaptor, clock or telephone.

With the exception of the ACOUSTIC device all bugging devices rely on conveying speech to a remote location using some sort of ‘carrier’ i.e. ULTRASONIC, VLF, RF or OPTICAL.

An ACOUSTIC device may be as simple as placing a glass against your neighbours wall to establish what is going on next door, you will be surprised how effective this can be. Most of all it’s cheap and easy to do. Sound leaking through cavities or air conditioning ducts fall into the same category.

An ULTRASONIC (VLF) device converts sound into an audio signal which is above the range of human hearing.

A RADIO FREQUENCY (RF) device is the most commonly found form of bugging a room etc. These are cheap, easy to use, easily concealed and deadly effective. Sound is carried away on an RF ‘carrier’ wave and may be transmitted, received and recorded. Usually these bugs will be carried for up to 500 metres away. The more sophisticated ones up to 1000 metres. There are even devices available which can be listened to from anywhere in the world, which work similar to a mobile phone.

An OPTICAL-BUGGING device conveys sound (or data) away on an optical pulse or beam of light. OPTICAL_BUGGING devices are capable of transmitting large amounts of data but require a direct ’line of sight’ to a Listening Post (LP) but are susceptical to the climate conditions i.e. rain, sleet, fog, snow etc.