Aqua Lung i300 Console Dive Computer for Scuba

4 operating modes. Air, Nitrox, Gauge (with run timer), and Free Dive (tracks calculations to allow switching between DIVE and Free) on the same day User changeable battery and data retention. Maintains settings and calculations between battery changes, Backlighting. For easy reading in low light Audible alarms and additional high-visibility LED warning light for additional safety Pre-Dive planning feature allows a preview of your next dive, Water-activated on switch, to give a no-worries start to the dive, Single button access to last dive display (max depth and bottom time) History Mode includes total number of dives, max depth, total dive hours, and lowest temperature, Nitrox mix to 50% O2, Optional deep stop with countdown timer, Salt or fresh water dive selection, Automatic altitude adjustment ensures an accurate profile.