You May Need These
Description
Description
The Mares Puck 4 dive computer is a compact, reliable tool for scuba and diving sessions. It uses the Bühlmann ZH-L16C algorithm with adjustable gradient factors to tailor gas management and decompression safety. It supports air and nitrox (EAN 21%–99%) and includes a bottom timer mode for depth tracking during dives.
With a maximum depth of 150 m (492 ft) and logbook capacity of up to 100 dives, the Puck 4 records data for later review. It features a clear segment display based on chip-on-glass technology with 800 segments for crisp readings, and a mineral glass display for durability. A user-replaceable CR2450 battery provides up to 100 dives of life. Integrated Bluetooth enables direct connection to the Mares or SSI app for logbooks, plan updates, and firmware upgrades. The design includes intuitive single-button operation and removable straps, including a bungee option, for comfortable wear on long dives.
Features
Features
- Bühlmann ZH-L16C algorithm with customizable gradient factors
- Air, nitrox (EAN 21%–99%), and bottom timer modes
- Multigas capable, supporting up to three gases
- Clear segment display with chip-on-glass technology (800 segments)
- Bottom timer mode with resettable average depth and stopwatch
- Decompression dive planner with user-adjustable surface interval
- Logbook memory up to 100 dives with graphs accessible via the Mares app
- User-replaceable battery (CR2450) offering long life
- Integrated Bluetooth for direct connection to Mares or SSI app
- Intuitive single-button operation
- Easily removable and replaceable straps, including a bungee option
- Firmware updates via the Mares app
- Plan mode with metric and imperial unit options
- Fresh and seawater settings, residual nitrogen reset, and alarm customization
- Option to exclude audible alarms
Specifications
Specifications
| Material | CR2450 |
| Battery Duration | 100 hours dive time |
| Nitrox Use | EAN from 21% to 99% |
| Max Displayed Depth | 150 m / 492 ft |
| Ascent Rate Indicator | true |
| Memory Capacity | 100 hr |
| Profile Sampling Rates | 5 s |
| Display | Segment Display |
| Gas Switching | true |
| Stopwatch | true |
| Watch | false |
| Dual Time | false |
| Daily Alarm | false |
| Plan Mode | true |
| Choice Metric and Imperial | true |
| Fresh and Seawater Settings | true |
| Residual Nitro Reset | true |
| Option to Exclude Audible Alarms | true |
| Exclusion of "Uncontrolled Ascent" | true |
| Altitude Adjustment | false |
| Logbook Memory | 100 dives |
| Display Material | Mineral glass |
| Upgradeable Software | true |
| Air Integrated | false |
| Graphic and Numeric Tank Pressure | false |
| USB Charger | false |
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
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.
