The Aqua Lung i550C Dive Computer is straight forward and rugged which is everything you want in a dive computer. Featuring three dive modes, Air, Nitorx and gauge along with bluetooth connectivity for data transfer using the DiverLog+ app for wireless interaction. It has an easy-to-read display with a large face console so you can read the data with no issues at all. It also accurate real-time gas data so you can manage gas with precision. Aqua Lung i550C Dive Computer Features: Bluetooth connectivity: data transfer using the DiverLog+ app for wireless interaction. 3 Operating Modes: Air, Nitrox and gauge dive modes User-changeable battery & data retention: Maintains settings and calculations between battery charges Gas-Intergrated: Tank pressure easy to read Easy reading in low light conditions Increased Safety: Audible alarms and high-additional visibility LED Warning light Updateable software History Mode: allows you to see total dives, maximum depth, total dive hours and lowest temperature. Records up to 24 dives Nitrox Capacity: up to 100% O2 Water Activation