infinity transmitter

infinity transmitter

[in′fin·əd·ē tranz′mid·ər]
(electronics)
A device used to tap a telephone; the telephone instrument is so modified that an interception device can be actuated from a distant source without the caller's becoming aware.
References in periodicals archive ?
A Gulf News investigation reveals these GSM bugs, also known as Infinity Transmitters and Spy Phone Bugs, are also available in China Mall in Ajman and in Sharjah.
It is difficult to believe that the primary design of devices described in ads as FM telephone transmitters, infinity transmitters, telephone taps, and room bugs have any purpose in life other than to surreptitiously intercept wire or oral communications.