AERIS Epic Hoseless Dive Computer Watch (Complete System) with PC Cable Hoseless air integrated technology - User-replaceable batteries - Audible and visual alarms Nitrox programmable with up to 3 Nitrox mixes up to 100% O2 Buddy Pressure Check? - button press underwater scans for pre-programmed transmitters Includes PC Download / Settings Upload Cable - Safety stop count-down timer Advanced watch functions including alternate time zone, stopwatch, lap timer, daily alarm, and count