Eric S does the tusa zen iq-900 have adjustable po2 settings?
TIMUR T Yes, you can set up a High pO2 alarm. There is a manual available for download at tusa site. You will need one because the menu structure of this Computer is not obvious.
ANABELA M yes, it has gas1 & gas2 ranging from 21% to 50% + 50% default
ALLAN R Yes. It goes from 21 to 50 in PO2 mode.
It is complicated to use with the buttons. I highly suggest the USB cable. It makes it way easier to set up the watch. It also works with MacDive.
I am happy with the purchase.
MICHAEL N Absolutely, yes.