The PETREL 3 gives divers our most connected experience. A stunning, easy-to- read, 2.6 AMOLED display is protected by a toughened glass lens, titanium bezel, and piezo touch buttons. Air integration is standard with up to four Shearwater transmitters to customize a solution from open circuit to rebreather and bailout gas pressure monitoring. Safety is increased with a strong vibration alert system, and a user-changeable AA battery offers long dive times and ease of replacement. PETREL 3 is available in standalone or rebreather monitoring models, including DiveCAN, 4-pin AK, and Fischer port connections. Features Large, easy-to-read display - 6.60cm / 2.6 bright and clear AMOLED display. Impact resistant toughened aluminosilicate glass screen with superior clarity Two Button Interface - Easy to navigate, state aware menu structure User Replaceable AA Battery - The Petrel 3 works with any type of standard AA battery Digital Compass - Three axis, tilt compensated, digital compass. Available in all modes Strong vibration warning alerts Bluetooth Wireless Technology - Smart ready Bluetooth wireless technology for communication with PC, Mac, iPod and iPad Multiple Languages - Languages include English, French, Simplified Chinese, Traditional Chinese, German, Portuguese, Korean, Japanese, Italian, and Spanish Cloud Control - Download and display dive logs quickly with Bluetooth wireless technology. You can display as much or as little information as you need. The Shearwater Cloud is available in 13 languages. Multiple Diving Modes Air / Nitrox / 3 Gas Nitrox - Easy and intuitive operation out of the box. Optionally air integrated OC Technical - Trimix enabled by default. Optionally air integrated CC/BO - Closed circuit/Bailout trimix enabled. Constant PO2 for closed circuit. Optionally air integrated for diluent, oxygen and bailout gases Gauge - Depth, time, resettable stop watch function. Full dive logging. Tank pressure information accessi