Yes, at this point the students and I are just on air. I don't think I will try that with Nitrox on the students....not yet anyway. I have had no troubles, no flooding, fogging or transmitter drop out at arms length. You do need to be 2-3 feet from the transmitter on the students to pick up their signals. It is the same transmitter I think as on the other Oceanic wireless computers. Now I am looking forward to the mask intergrated computer due out in November from Oceanic. Dang its fun to get toys!