The popular NiTek Duo is a user-friendly, easy-to-read dive computer with Nitrox capabilities. Worn on the wrist or as part of an SPG console, 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. Comes with CO8177 Screen Protector.