mods
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.