The CM19E Computer Interface sends and receives Wireless Radio Frequency (RF) signals, and works with HOME’s software. It receives RF commands from X10 motion detectors (sold separately) and communicates these commands to the X10 software. The software interprets these commands and tells a CM19E to transmit the appropriate RF commands to a TM13 Transceiver (sold separately). The CM19E can therefore work with the X10 software to automatically turn on lights, appliances, and cameras when motion is detected and also lets you control lights, appliances, and cameras over the Internet.