Main features of the Cressy 'Edy II' dive computer are:
- Buhlmann ZH-L8 algorithm, redesigned by Randy Bohrer to make it suitable for a more sophisticated RGBM program. The result is a very similar algorithm to the ZH-L16, but less penalising regarding water temperature and repeated overshooting of the ascent speed.
- Tissue compartments: 12 with saturation half times of between 5 and 640 minutes
- Complete processor of data, also including possible decompression, for dives using air or oxygen-rich mixes (Nitrox)
- Complete setting of FO2 and PO2 parameters; it is possible to set PO2 between 1.0 and 1.6 bars and FO2 between 21% and 50%
- Possibility of making a Nitrox dive after an air dive (even with desaturation underway)
- Maximum depth alarm (can be activated by user)
- Display with UFDS (User Friendly Display System) for perfect comprehension and easy legibility of data
- Dive plan (Scrolling) manual
- User can change measuring units from metric system (metres and degrees Celsius) to imperial system (ft and Fahrenheit)
- Audio and visual alarms
- Nitrogen saturation bar graph
- CNS oxygen toxicity bar graph
- Ascent speed bar graph
- Backlit display
- Differentiated ascent speed according to depth
- Instant PO2 indicator
- Safety Stop (not compulsory) indication at end of dive (between 9.9 and 3 m)
- Thermometer
- Possibility of setting GAUGE program (bottom gauge/timer)
- Possibility of setting FREE program (free-diving)
- Complete logbook (30 h or last 60 dives) of dive profile (3 independent logbooks for each of the COMPUTER, GAUGE and FREE functions)
- Dive profile can be reviewed without interface (30 second intervals in the COMPUTER and GAUGE functions, 1 second intervals in the FREE function)
- Dive history memorised (maximum depth, number of dives and hours spent underwater). Three different and independent histories for the COMPUTER, GAUGE and FREE functions
- Automatic depth setting from 0 to 6000 metres
- Graphic notification of flat battery
- Maximum depth in COMPUTER function 99.9 m
- Maximum depth in GAUGE and FREE functions 199.9 m
- Calendar and watch with alarm and second time zone functions
- A PC connection, the Cressi 'Edy' interface, is optional, but not included in this order (see Related Products on this page)

Size and weight:
Diameter: 51 mm - Height: 12mm - Weight: 75g

Pressure sensor:
- Calibrated for salt water (the depths indicated are about 3% lower in freshwater)
- Temperature compensated
- Measurement field in the DIVE function: 0-99.9 m
- Measurement field in the GAUGE and FREE functions: 0-199.9 m
- Precision: about 1% (T 20 degrees C)
- Reading resolution: 0.1m (from 0m to 99.9m), 1m (from 100m to 199.9m)
- Surface interval: from 0 to 48 hours
- Monitoring of depth modes: from 0 to 6000 m, measured every 10 minutes
- Dive time: from 0 to 599 min
- Interval data acquisition: 30 sec (DIVE/GAUGE programs); 1 second (FREE program)

Thermometer:
- Resolution: 1 degree C
- Measurement field: -5 degrees Celsius + 40 degrees Celsius
- Precision: +/- 2 degrees Celsius; adaptation to degrees in temperature change every 1 min

Watch:
- Precision: average about 10 sec a month
- Display 12/24 hours

Battery:
- Flat tab 3V Li/MnO2 CR 2032 battery. Lasts for an average of 2 years (based on 50 dives a year)