No Customer Service
I am a fitness instructor and only needed this device to work for about an hour, three days a week.  The product worked fine for about 8 months and then I had trouble with the connection between the headset and the amplifier.  The sound was intermittent.  The sound would stop working during class and I could sometimes unplug the headset and put it back in and it would be fine for a while.  Unfortunately, not dependable.  I tried contacting the company for guidance via email and voice mail and never received a response.  Unfortunately, I have not been able to find a better replacement.
Rating: 3 stars