Heyu is a program that allows your computer to control devices by transmitting information over your house's power lines. The program will work with: - The CM11A and CM12A made by the X10 corporation. The "Activehome" package (CK11) includes the CM11A. - The Home Director package marketed by IBM. - The Home Control package marketed by Radio Shack (model 61-2417). It will not work with: - CK17 Firecracker (computer controlled RF transmitter) - CP290 (older style computer - X10 interface) - CP10 - A power strip with X10 built in ??? - Extend 1.1 (look for newer than 1.2beta4)