scuba DIVING REGULATOR OCTOPUS WITH AERIS COMPUTER. This octopus was only used on two trips and is in almost new condition and contains the following components- SCUBA PRO MK20 Breathing Regulator- SCUBA PRO 2nd Stage G250 - AERIS ATMOS PRO 300G Dive Computer- AERIS Dive Compass- Owners ManualsAs with all scuba gear, have the BCD professionally inspected and serviced before diving.