The DG03 is a feature rich three gas nitrox Dive Computer (each of the three gases may be defined as Air, Nitrox, or 02 up to 100%) which also includes modes for use as a Digital Gauge and Free Diving. Manufactured excusively for Dive Gear Express by Hollis, the DG03 offers an excellent easy-to-read LCD display with backlight. The DG03 provides information on no-decompression and decompression times, nitrogen and oxygen absorbtion and elimination during all dive phases. It allows you to switch between three different breathing gas mixtures during the dive, enabling accelerated decompression. As a Nitrox decompression computer the DG03 uses an algorithm based on Bühlmann ZH-L16c with modification to support deep stops.