Yep, the 275 as well. And once it's powered on, thru the mic's power button that's on top in between the channel up and down buttons, it stays on. So when i trigger the aux switch it goes back to that on position. Exactly what you would want it to do, it's perfect.Heck yeah!!
Out of curiosity, did you install the MXT275 model as well? If so, does the unit power up when you turn the Aux switch on, or do you still have to separately turn it on with the hand mic as well? Another guy on this thread was having issues with that.