2. Intelligence Equipments
Still, Digital & Surveillance Camera
Audio Recorder
Eaves Dropper
Telephone Bugger
Bug with transmitter
Remotely activated mobile phone microphones
Recording bugs
Listening from a distance without radio transmission
Reconnaissance Satellites
CCTV
Internet and Computer
3. Covert listening device (Bug)
A covert listening device, more commonly known
as a bug, is usually a combination of a miniature
radio transmitter with a microphone. The use of
bugs, called bugging, is a common technique in
espionage and, increasingly, in police
investigations.