NiTek Duo Question for AIR

Im looking to dive a location of fresh water and I have a few AIR filled tanks to use up. I grabbed the ol DC last night and unless you place the MIX1 on 21% I can not figure out how to switch it from Nitrox to air. I may be missing the point of the DC but Im curious if there is a switch over or just place 21% into the MIX 1 field???

Also the same as a TUSA IQ700 series too, Dive Rite NiTek Duo.

Either way Im getting wet today. Just figured I could get me a profile of the dive in this body of fresh water.

STEVE

I got my answer, appreciate you reading.

Answer: Set the MIX 1 to 21%
(79% Nitrogen, 21% O2, 1% inert gases)Normal atmosphere we breathe

Its all about learning your gear! Get it right before you bail off and dont know!

Im fixin to hit the water! Later on fellas! SPLASH