The NiTek Duo turns on automatically upon descent and monitors up to two different gas mixes. Mix 1 is programmable for Nitrox mixes ranging from 21-50% and Mix 2 is programmable for Nitrox mixtures ranging from 21-99%. Underwater, divers can switch between mixes with the push of a button. Upon surfacing, the NiTek Duo will maintain the gas mixture entered until midnight, when it clears and must be reset the following day.

Using a modified Buhlmann ZH-L16 algorithm, the NiTek Duo can calculate decompression stop times for required stops as deep as 90-feet. Simple to program, the NiTek Duo has intuitive menus that are easy to understand without complex instructions.

A lightweight frame along with a large, 2.5-inch (6.35 cm) screen make it easy to keep track of the dive at a glance.