Suunto D4i Black
An easy-to-use dive computer with freedive mode and air integration. Made in Finland.
$0
A GREAT ALL-ROUNDER
An adventure should take you anywhere, any way you want to get there. That’s why Suunto D4i gives you great freedive features as well as the option of a wireless readout of your tank pressure and air time. Go with your own dive inspiration—you'll be amazed at how far you can go on just one breath.
The D4i Black comes with an elastomer strap and doesn't include a USB interface cable.
PRODUCT HIGHLIGHTS
- 4 modes incl. freediving
- Light weight
- Optional wireless air integration
- Suunto RGBM
Partners
Suunto Algorithms
Suunto DM5
Specifications

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Measurements48.6 x 43.8 x 16 mm / 1.91 x 1.72 x 0.63 "
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Weight85 g / 3 oz
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Bezel material:Stainless steel
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Glass material:Mineral crystal
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Case material:Composite
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Strap material:Elastomer
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What's in the box?Suunto D4i with black elastomer strap and black extension strap, Scratch guards (2 pcs), safety leaflet, quick guide and dive legal leaflet with warranty information, Suunto logo sticker
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Country of manufactureFI
- Full continuous decompression algorithm - Suunto RGBM
- Four modes: air, nitrox, free and off
- Innovative apnea timer, and a timer in air/nitrox modes
- Updateable firmware
- Optional wireless air integration – current cylinder pressure, remaining air time
- Built-in dive planner
- Detailed graphical logs and dive data on your PC/Mac using Suunto DM5 software
Technical specifications
GENERAL
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Bezel material:Stainless steel
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Glass material:Mineral crystal
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Case material:Composite
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Strap material:Elastomer
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Weight85 g / 3 oz
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Water resistance100 m (ISO 6425, EN 13319)
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Battery life 100 dives/year1.5 years
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Battery typeCR 2450
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Time, date✔
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Alarm clock1 daily alarm
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Dual time✔
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Stopwatch timer✔
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LanguagesEN
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Backlightelectro-luminescent
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Configurable backlightduration: off, 5, 10, 20, 30, 60 s
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Display typematrix
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Display resolution49 x 22
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Battery indicatorlow battery indicator
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Metric and imperial units✔
BATTERY LIFE
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In time mode2 years
CONNECTIVITY
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Data transferUSB cable (optional)
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Connectivity (between devices)inductive
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Compatible with DM5✔
PHYSICAL SPECIFICATIONS
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Operating temperature0° C to +40° C / +32° F to +104° F
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Storage temperature-20 ° C to +50 ° C / -4° F to +122° F
DIVING FUNCTIONS
BASIC
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Maximum operating depth (EN 13319)100 m / 328 ft (EN 13319, ISO 6425)
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Nitrox (and air)✔
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Freedive✔
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Dive time0 to 999 min
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Surface time0 to 99 h 59 min
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No fly time✔
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Safety Stop✔
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Deep Stop✔
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Ascent time display0 - 199 min (- - after 199)
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CNS/OTU (OLF) calculation✔
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Wireless air integrationoptional
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Decompression modelSuunto RGBM
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Personal adjustment0 - 2
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Altitude adjustment0 - 300 m / 300 -1500 m / 1500 - 3000 m
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Gases1 gas (Oxygen 21 - 50%)
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Gas max pO21.2 - 1.6
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Timer✔
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No-decompression planner✔
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Logbook memory~140 h (20 s sampling rate)
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Logbook bookmarks✔
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Logbook sampling rates10, 20, 30, 60 s (1, 2, 5 s freediving)
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Dive historylifetime
DIVE ALARMS AND NOTIFICATIONS
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Dive time✔
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Maximum depth✔
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Tank pressure✔
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High pO2 (hyperoxic)✔
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Too fast ascent✔
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Decompression ceiling violation✔
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Deepstop violation✔
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CNS/OTU (OLF) 80% / 100%✔
FREEDIVING
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Apnea timer (O2/CO2 tables)✔
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Freedive number✔
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Freedive day history✔
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Freedive total historylifetime
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Depth notifyyes (5)
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Surface time notify✔
OUTDOOR FUNCTIONS
WEATHER
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Temperature display range-20° C to +50° C (+/- 2° C) / -9° C to +122° F (+/- 3.6° F)
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Temperature resolution1° C / 1.5° F
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Temperature✔
TRAINING FUNCTIONS
SPEED AND DISTANCE
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Chrono✔