Phone
Bugging .com
This system was especially constructed to conversation recording inside a car, with background noise filtering.
Added to the sophisticated transmitter a professional VOX board that enables transmission only above specific noise level - which can be adjusted.
The VOX system saves battery current at periods with no conversation.
The transmitter is high - reliability fm modulated hybrid circuit.
Frequency operation is 433 MHz crystal-controlled FM narrow band.

No antenna required. Audio bandwidth: 20 Hz to 30 kHz.
Range up to 1500 feet in open area.
Powered by 9 volt alkaline battery, the transmitter can operate up to 10 hours in transmit mode.
Automatically transmits the conversation to a receiver immediately a conversation begins.