Suunto D4i Black
An easy-to-use dive computer with freedive mode and air integration. Made in Finland.
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 D4i interactive learning tool
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
TECHNICAL SPECIFICATIONS
GENERAL
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Bezel materialStainless steel
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Glass materialMineral crystal
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Case materialComposite
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Strap materialElastomer
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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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LanguageEN
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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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Metric and imperial units✔
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Battery indicatorlow battery indicator
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
BATTERY LIFE
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In time mode2 years
CONNECTIVITY
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Connectivity (between devices)inductive
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Data transferUSB cable (optional)
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Compatible with DM5✔
OUTDOOR FUNCTIONS
WEATHER
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Temperature✔
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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
TRAINING FUNCTIONS
SPEED AND DISTANCE
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Chrono✔
DIVING FUNCTIONS
BASIC
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Altitude adjustment0 - 300 m / 300 -1500 m / 1500 - 3000 m
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Ascent time display0 - 199 min (- - after 199)
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CNS/OTU (OLF) calculation✔
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Decompression modelSuunto RGBM
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Deep Stop✔
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Dive historylifetime
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Dive time0 to 999 min
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Freedive✔
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Gas max pO21.2 - 1.6
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Gases1 gas (Oxygen 21 - 50%)
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Logbook bookmarks✔
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Logbook memory~140 h (20 s sampling rate)
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Logbook sampling rates10, 20, 30, 60 s (1, 2, 5 s freediving)
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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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No fly time✔
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No-decompression planner✔
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Personal adjustment0 - 2
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Safety Stop✔
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Surface time0 to 99 h 59 min
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Timer✔
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Wireless air integrationoptional
DIVE ALARMS AND NOTIFICATIONS
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CNS/OTU (OLF) 80% / 100%✔
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Decompression ceiling violation✔
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Deepstop violation✔
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Dive time✔
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High pO2 (hyperoxic)✔
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Maximum depth✔
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Tank pressure✔
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Too fast ascent✔
FREEDIVING
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Apnea timer (O2/CO2 tables)✔
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Depth notifyyes (5)
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Freedive day history✔
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Freedive number✔
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Freedive total historylifetime
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Surface time notify✔