Did you know that if your wireless microphones operate in the 600Mhz frequency range that they will need to be replaced due to the FCCs auction of wireless spectrum to TMobile. Even if you are in the know about this sale the recent development is that they could be occupying the spectrum before the end of the year! This is quite a bit sooner than the 2020 transition deadline that's been in the news. That means your wireless mics would be illegal as anything that could cause interference in these bands would be prior to 2020 or you could experience heavy interference once TMobiles sites go live. Here is an article about the date moving up. I'll post some of my wireless mic replacement recommendations soon!