The Mares Quad Air computer has multi-gas capabilities, a large clear display with jumbo size characters, decompression dive planner with user adjustable surface interval and a long battery life, that is user replaceable. This innovative computer can receive data for Hoseless Tank Data Integration, supporting up to three air transmitters. When diving the wrist computer will provide current depth, maximum depth, stopwatch, dive time, temperature, and when ascending, ascent speed in feet or metres per minute.