This PKI 2240 Digital Mains Transmitter is designed especially for absolutely professional use only. Small-sized, light-weight and no risk of detection during critical observation. The transmission signal is created and coded in a digital pseudorandom, so that a highly secured transmission is guaranteed. This digital mains transmitter is installed into a socket outlet or lamp once and can then record and wirelessly transmit secret conversations for years. If necessary, this „Trojan Horse“ can be activated via radio. This also applies to transmission power and frequency adjustment. The integrated microphone still records conversations from a distance of 15m.