All the information you need right on your wrist! The Matrix features a high-resolution display and tilt-compensated digital compass with bearing function. The graphic profile during the dive along with the multi-gas algorithm make this a favorite of divers. The multigas capability gives you the benefit of a shorter decompression schedule by switching gases during the dive.Depending on the model, two or three gases can be specified with oxygen content ranging from 21-99% EAN (NITROX). Includes a choice of digital or analog time of day display and second time zone and more, all in a sleek metal housing. Rechargeable battery allows for years of maintenance-free use. And the charging cradle doubles up as PC or Mac interface for downloading dives and for firmware upgrades. Comes with matching rubber strap.Additioal strap options sold separately here and here.Features:Max displayed depth: 492ft.Memory capacity: 36hr.Profile sampling rates: 5sec.Tempered, scratch-resistant glass displaySoftware upgradeableFull dot matrix resolutionWatchCalendarDual timeStopwatchDaily alarmBattery power indicatorUSB rechargeable batteryPlan modeMetrical/imperial unitsFresh/seawater settingsResidual nitrogen resetOption to exclude audible alarmsExclusion of uncontrolled ascentAscent rate digital indicator (ft./min.)Altitude adjustmentTwo year limited warranty