The Aqua Lung i450T Dive Computer is a wrist watch sized computer full of useful features that you can use in everyday life as well as underwater. Optional wireless air integration so you can see how much air you have left on your computer for life as transmitters will pair for life without having to re-pair again and again. Hoseless Air Integration The i450T uses AquaLung’s patented Gas Time Remaining Algorithm when paired with a transmitter to calculate exactly how long your gas supply will last based on your breathing rate and depth for more accurate gas management. You can connect up to 3 different transmitters with 3 different gasses to the i450T for multiple stages. Multi-functional Air, Nitrox, Gauge and Free Dive Modes are all dedicated modes for whatever discipline you are diving. A built in digital compass makes sure you always know which direction you’re going and features a North reference, return bearing lock, and declination adjustment. Don’t forget to validate your warranty by visiting the Manufacturers Warranty | Registration Page Features Multiple gas capability manages up to 3 Nitrox mixes (with 3 transmitters), each with individual PO2 set points Automatic altitude adjustment ensures an accurate profile Advanced watch functions including alternate time zone, stopwatch, lap timer, daily alarm, and countdown timer Pre-Dive planning feature allows a preview of planned dives to confirm no-decompression limits Automatic Safety Stop Countdown displayed in minutes and seconds for clarity User changeable battery, with a data retention feature that maintains settings and calculations between battery changes User-updatable software gives access to the latest features and upgrades Backlighting for easy reading in low light Salt or fresh water dive selection Optional deep stop with countdown timer Specifications Included in the Box: Dive computer Digital instruction manual Paper Safety Reference DiverLog brochure Quick Reference card Lens Protector Download Cable View product manual ABOUT Aqua Lung Aqualung have been industry leaders producing a range of diving equipment from regulators and computers to drysuits, wetsuits and masks. Aqualung have been producing dive equipment since 1943, started by Jacques-Yves Cousteau and Émile Gagnan who introduced the world to scuba diving and the Aqua-Lung.