Much better than a CM11a!
Some years ago, I put a small humidifier in my living room and my X10 lamp modules in that area stopped working properly... I was using a CM11a with my system at that time. I couldn't afford to replace my lamp modules with Z-Wave units then but could afford to install one of these. Worked like a charm! The signal strength is listed as 6 volts. That's a lot stronger than anything else I've seen.