I think you should avoid any mention of Class 3 devices. They are not common for the simple reason that their range makes them practically useless except for true PANs, which is not an LMCE use-case. While it is true that many devices can achieve 3m, many will only achieve the specified 1m, especially with local environment considerations, and this renders it useless for us. We don't want to be giving advise that clearly is not going to work for some people. I think the Class 2 devices are the only real option.