Phone transmitters There are 2 products.

The miniature phone transmitters are connected to the phone line and transmit both side of conversation to a suitable receiver allowing to monitor (and record) the conversation from distance. The phone transmitters are divided in several categories. You may chose from the 2 main categories: VHF Phone Transmitters UHF Phone Transmitters We sell wiretaps which connected to the telephone line in series or in parallel. They are active only at the time the handset is picked up, making them difficult to be detected.