The SLC-9 system consists of two crossed frequency extremely low frequency (ELF) transmitters/receivers. They are supplied with varous cables to permit private communication over telephone, intercom or power lines.   Each transceiver is battery powered and NO power is drawn from the lines to which they are connected. The units contain integral microphones and an optional external microphone (SLC-9EM) is available. A belt clip on the back assures easy handling.

BE CAREFUL WHEN WORKING WITH HOT A.C. LINES!!