Even more news about it: I almost wrecked tools and parts because of this pendant! I was able to smack the machine's E-Stop in time. It just flat loses communications from time to time. It also messed up the Y position between the pendant and Mach3. The pendant said it was at 0,0,0 but the Mach3 readout said 3 inches off on Y, and proceeded toward wrecking my part, because of it. It might be a wireless problem, as there is always a lag on the position readouts. Maybe the hard wired version is more reliable. At this point, all it's worth is for creeping up on edges to set tool zeros. After that, I shut it down to keep it from messing things up. It will do a few other things right, like going to 0,0,0, but to have uncertainty in how your cnc is being controlled is not acceptable to me. Looks like a product that was designed and built without any product testing before hitting the market.