Seac Action HR Dive ComputerSeac Action HR Dive Computer is a wrist mount computer designed for scuba and freediving, providing clear, on wrist data for dive planning and real time monitoring as part of your diving gear. Three main modes cover the needs of divers: SCUBA mode manages recreational dive profiles with a Bhlmann ZHL 16C algorithm and supports 1 or 2 mixes (air, Nitrox, and O2 up to 99%). GAUGE mode functions as a depth gauge and stopwatch for standalone dive