OK, so i got the SMH10's with the universal mc and have been using them for the last week including a crane job. First, they are very high quality. they dont feel cheap at all. They were simple to install on our Stein helmets though my installation was a little messy because i was all amped up like a kid on Christmas morning. i did have some issues mounting them in my ear defenders because the inside is concave. Ended up using the speaker pads to create a "flat" surface for them to stick to. That works. I mounted the mike on the side of the ear defender so that I could transfer the whole unit to another hardhat if i need to. I travel around to eight operations and work with a lot of different crews so being able to transfer the set is a plus. Nobody wants to wear someone elses manky old hardhat. The adhesive between the mic and the velcro is terrible. Thinking about supergluing it to the ear defender.
I also just got a set of the 10R's, and i like the low-pro part but transferability will be an issue. I used them on a crane job this week where i had to work from a man basket. That really sucks--like wrestling a St. Bernard while trying to do tree work--and I can confidently say that these saved a ton of time and effort. if i had to communicate with the operator with hand signals, it would have been ten times worse. the crane operator was skeptical at first and didn't much like wearing one of our hardhats but was sold by the end of the day. I'll probably pick up one of the headband models for the crane operator.
Performance is generally excellent. Range is nowhere near 900 yards but plenty as long as you have a clear line of sight. probably more like 350. Sound quality is pretty darn good as well. When someone has the intercom on and is running a saw you can hear the saw but you can also clearly hear the person over the noise. same with the chipper. I could even hear the crane operators phone conversation when he left the intercom on and the mike was pulled away.
All in all, very satisfied. i would expect to see these become commonplace.
Thanks everyone for bringing these to my attention. We have been looking for something like this for a long time.