Its on the drawing boards, Dick. That's all I know. Haven't seen, nor tested one. Keith said a prototype they are testing picked up 150 rpm or so, and had less 90 dB at 9 feet. Personally, I'd go with a "standard" canister setup, or a 2-into-1 system with single large canister. But, if they can get a system that FITS, it would be a very good thing.