mods
To sound its best, this unit requires a signal processor between the source and the transmitter. Either there is no AGC circuit or it simply does not work well. A good AGC circuit would help address the common complaint of low audio volume or under deviation.
According to an Amazon review, "there is no AGC in version 3.0. It was mentioned in the early instructions by mistake, and has been removed from the current instructions. "
increase power via secret switch
The 2.0 had a switch in the battery compartment under a small sticker that will bump the power up above regulation. You can get a paper clip and move the slide switch. However, on the 3.0 version to extend range from 150' to 600', you now just press the Cycle button then, at same time, press the Mute button, until the lightning bolt at the top of the screen appears.