I bought this for use with my Sony camcorder. I chose it because it was a 900 MHz system rather than the 100 MHz systems from Hysonic, etc. The included lapel mike is not very good. Lots of distortion and very cheaply made. I tried a better quality Radio Shack lapel mike, #33-3013 and got much better results. Compared to putting the mike right into the camcorder, the wireless transmitter shows considerably more noise and lower sound level. No noticeable difference in frequency response, at least for voice recording. Dropouts started occuring when I was about 50 feet away. Bottom line is this isn't broadcast quality but certainly adequate for amateur use.