I too use the 900MHz headphones. Great all around the house, and into the yard too. Got them at a hamfest, NIB for $60.00. Was just or still are on sale for $99.00. The IR is ok if you stay in that room, and it isn't in bright sunlight. For the few xtra bucks, the 900 MHz is the way to go. I run it from my DSP-599zx, and can direct the audio from any radio into the headphone base unit. Vy73, Mike. KD9KC firstname.lastname@example.org The farthest West ham in West Texas. Bill Richarz wrote: > Just another comment, not to do with the mics, but the > headset. For the birds, I use one of those Radio Shack > 900MHz wireless headsets.