The Suunto D4f is a lightweight, watch-size computer dedicated to freediving, snorkelling and spearfishing, with an apnea timer and depth and dive time alarms. Made in Finland.

Diving functions

Basic

• Maximum operating depth (EN 13319): 100 m / 328 ft (EN 13319, ISO 6425)
• Freedive
• Dive time: 0 to 999 min
• Surface time: 0 to 99 h 59 min
• No fly time
• Ascent time display: 0 - 199 min (- - after 199)
• Timer
• Logbook memory: ~140 h (20 s sampling rate)
• Logbook bookmarks
• Logbook sampling rates: 1, 2, 5 s
• Dive history: lifetime

Freediving

• Apnea timer (O2/CO2 tables)
• Freedive number
• Freedive day history
• Freedive total history: lifetime
• Depth notify: yes (5)
• Surface time notify
• Depth alarm
• Dive time alarm

Technical specifications

• Measurements: 48.6 x 43.8 x 16 mm (1.91 x 1.72 x 0.63 in)
• Weight: 86 g (3.03 oz)
• Bezel: Stainless steel
• Glass: Mineral crystal
• Case: Composite
• Strap: Elastomer
• Water resistance: 100 m (ISO 6425, EN 13319)
• Battery life 100 dives/year: 1.5 years
• Battery type: CR 2450
• Time, date
• Alarm clock: 1 daily alarm
• Dual time
• Stopwatch timer
• Backlight: electro-luminescent
• Configurable backlight: duration: off, 5, 10, 20, 30, 60 s
• Display type: matrix
• Display resolution: 49 x 22
• Battery indicator: low battery indicator
• Metric and imperial units

Battery life

• In time mode: 2 years

Connectivity

• Data transfer: USB cable
• Connectivity (between devices): inductive
• Compatible with DM5

What is in the box

Suunto D4f Black with black elastomer strap, scratch guards (2 pcs), safety leaflet, quick guide and dive legal leaflet with warranty information, Suunto logo sticker

Options on this listing

This page is the Suunto D4f in the Black version (Suunto part number SS023198000).