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Product Information
The Mares Quad Dive Computer is a wrist-worn scuba dive computer built around a large, three-line "Jumbo Size" segment display and a mirrored four-button layout, with a maximum displayed depth of 150 m / 492 ft and a user-replaceable CR2450 battery rated for 200 to 300 dives.
Who it is for
The Quad suits recreational and nitrox divers who want a straightforward wrist computer with an easy-to-read screen and simple button operation, both on land and underwater. Its gas switching and multi-mixing capability make it a fit for divers who use enriched air or switch gases during a dive, while the Deco Dive Planner and Runaway Deco Alarm help divers plan surface intervals and stay aware of mandatory deco stage increases.
Key details
- Maximum displayed depth: 150 m / 492 ft
- Nitrox use: EAN from 21% to 99%
- Memory capacity: 35 hours of dive profile logged at a 5-second sampling rate
- Display: mineral glass segment display with mirrored button function
- Temperature measurement range: -10°C to 50°C / 14°F to 122°F
- Battery: user-replaceable CR2450, rated for 200 to 300 dives
- Other functions: stopwatch, plan mode, metric/imperial units, fresh and saltwater settings, altitude adjustment, residual nitrogen reset, and the option to exclude audible alarms
The Quad is not an air-integrated computer and does not display tank pressure or include a USB charger; it is a time, depth, and nitrox-capable wrist computer with upgradeable software.
Compatibility and sizing
The Quad is available in four color combinations: Black/Yellow, Black/Blue, Black/Black, and Black/White. The original wrist strap can be swapped for bungees for divers who prefer that fit, and the computer supports Mares' BLUELINK bluetooth system for recording and sharing dive data with a smartphone. Each unit ships with a compact instruction manual printed in 20 languages, inserted into the original packaging.
DiveCatalog.com is an authorized Mares dealer and a dive shop in Irvine, California, operating since 2003; call or chat with us if you have questions about fit, color options, or BLUELINK compatibility before you buy.
- Jumbo Size display: Three lines of larger-format information for a more visible screen underwater.
- Mirrored button function: The four buttons mirror their function during the dive: the top two buttons both show depth, max depth, average depth, MOD, deep stop, or temperature, while the lower two show oxygen percentage, ppO2, and CNS data.
- Runaway Deco Alarm: Alerts the diver when staying at the current depth will cause a significant increase in mandatory deco stages.
- Deco Dive Planner: Includes surface interval input adaptable to the user's needs.
- Multi-mixing capability: Supports nitrox use from EAN 21% to 99% with gas switching.
- User-replaceable battery: Runs on a CR2450 with an extended battery life rated for 200 to 300 dives.
- End-of-dive minilog: Alternates every 4 seconds between max depth, average depth, dive time, and gas used for the just-completed dive, plus unsaturation, no-fly, CNS, and surface interval data.
- Clearer ascent warning: Improved ascent rate indicator in m/min or ft/min for a more understandable warning.
- Bungee-compatible fit: Original strap can be swapped for bungees.
- BLUELINK bluetooth: Can record and share dive data directly to a smartphone.
- Dive time display options: Can be shown with or without seconds, up to 999 minutes.
- Upgradeable software: the computer's software is upgradeable.
| Battery | CR2450, user-replaceable |
| Battery duration | 200 to 300 dives |
| Nitrox use | EAN from 21% to 99% |
| Max displayed depth | 150 m / 492 ft |
| Ascent rate indicator | m/min and ft/min |
| Memory capacity | 35 hours |
| Profile sampling rate | 5 seconds |
| Display | Segment display, mineral glass |
| Gas switching | Yes |
| Stopwatch | Yes |
| Plan mode | Yes |
| Units | Metric/Imperial selectable |
| Fresh and saltwater settings | Yes |
| Residual nitrogen reset | Yes |
| Audible alarm exclusion | Yes |
| Uncontrolled ascent exclusion | Yes |
| Altitude adjustment | Yes |
| Temperature measurement range | -10°C to 50°C / 14°F to 122°F |
| Logbook memory | 35 hours of dive profile at 5-second sampling rate |
| Clock | Quartz, time, date, dive time display up to 999 minutes |
| Upgradeable software | Yes |
| Air integrated | No |
| Tank pressure display | No |
| USB charger | No |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Why do I need my own dive computer?
A dive computer tracks the actual depth and time profile you have dived and the tissue loading that follows from it, which is personal to you. A rented computer has no record of your recent diving, and swapping models each trip means relearning the display and menus when you should be focused on the dive. Owning one you know well is a genuine safety and comfort improvement.
Can two divers share one dive computer?
No. A computer only tracks the profile of the diver actually wearing it, and even buddies who stay together do not follow identical depth and time profiles. Every diver needs their own computer, and passing one between divers or between dives is unsafe.
What does conservatism mean on a dive computer?
Conservatism settings make the computer's calculations more cautious, shortening allowed bottom times and adding margin beyond the base algorithm. Divers commonly add conservatism for factors such as cold, hard work, fatigue, or repetitive multi-day diving. How and when to adjust it is covered by your training and your computer's manual, so set it before you get in the water and follow what your computer tells you during the dive.
What kind of battery does a dive computer use?
Broadly there are two types: user-replaceable batteries, often a coin cell that you or a shop swap along with resealing an o-ring, and sealed rechargeable batteries that charge from a cable or dock. Neither is universally better, as replaceable cells are convenient on remote trips while rechargeables avoid ever opening the case. Follow the manual exactly for any battery change, because an improperly seated o-ring or case is the usual cause of a flooded computer.
Do I need to do anything special for altitude diving or flying after diving?
Yes, both change the picture, and both are governed by your training agency's guidance and your computer's instructions rather than any casual rule of thumb. Many computers have an altitude setting that must be configured before diving at elevation, and most display a no-fly or surface-interval countdown after a dive. Follow your computer and your training, and ask a dive professional or a dive-medicine specialist if you are unsure.
How do I care for a dive computer?
Rinse it in fresh water after every dive day, paying attention to the buttons and around any sensor openings where salt crystals form, and let it dry fully before storing. Keep it out of prolonged direct sun and extreme heat, and avoid pressing buttons while sand is on the case. Inspect the strap or bungee often, because a failed strap loses far more computers than a failed computer does.
What is the difference between wrist, console, and air-integrated dive computers?
A wrist computer is worn like a watch and read by raising your arm, while a console computer sits at the end of a hose with your other gauges. Air integration means the computer also displays cylinder pressure, either through a hose or from a wireless transmitter on the first stage, and often estimates remaining gas time. All of them run a decompression algorithm, so the real difference is where you read the information and how much of it you get.
Does the Mares Quad support bluetooth data transfer?
Yes. The Quad can use Mares' BLUELINK bluetooth system to record and share dive data directly to a smartphone.
Can I switch the Mares Quad's strap to a bungee?
Yes. The original wrist strap can be swapped for bungees for divers who prefer that fit.
What battery does the Mares Quad use and how long does it last?
The Quad uses a user-replaceable CR2450 battery rated for 200 to 300 dives.
What languages does the Mares Quad manual cover?
The Quad ships with a compact instruction manual printed in 20 languages, inserted directly into the original packaging, with settings, alarms, and dive mode information shown inside the cover.
