I dive the Tusa IQ-700 witch is the same as the Dive Rite NITEK DUO and Zeagle N2ition. I also dive the Cochran Commander, but I think the IQ-700 is a much better and more reliable computer. Display primary dive information; time elapsed and no decompression time remaining display. Current, max depth, Date, time, and water temperature display. Display graphs for ascent rates, N2 and O2 levels. It’s also a two gas computer with setting for 1 or 2 Nitrox mixes. Mix 1 is programmable for Nitrox mixes ranging from 21-50% and mix 2 is programmable for Nitrox mixes ranging from 21-99%. You are able to switch gas underwater, three user adjustable safety factor levels and gauge mode. Visible warnings for violation of ascent rate, no decompression, decompression stops and ceiling depth, Nitrox PO2 warnings.
For the money this computer will grow with you all the way to advance Nitrox. All three list for around $450.00, but you can pick them up for as low as $390.00.
DJ