The new NiTek Trio is a three-gas Nitrox computer that is easy-to-read and easy to use. It includes all the attributes of the popular NiTek DUO, plus the following new features: Dot matrix LCD displays dive profile in a graph format Diver can enter a custom message of up to eight (8) characters in two rows that will display at the top of the screen All three mixes are programmable from 21%-99% Nitrox A deep stop feature allows for safety stops at deeper depths Three user adjustable safety factor levels Digital compass integrated into the dot matrix display