Phone
Bugging .com

The latest technology in answering machine systems conceals phone line transmitter.
The transmitter is high - reliability fm modulated hybrid circuit.
Frequency operation is 433 MHz crystal controlled fm narrow band.
No antenna required. No battery required (Powered by line current).
Extremely difficult to detect - nil current consumption during on hook operation .
Audio bandwidth: 20 Hz to 30 kHz. Range up to 1500 feet in open area.