The Suunto D4 is all about enjoying your diving experience. Whether you’re on your well-earned annual dive holiday or honing your freediving skills, Suunto D4 keeps you informed and aware every meter of the way.Lightweight, easy to use, and practical. The D4 is constructed from lightweight composite material, with mineral glass face and stainless steel backplate. Comes in 4 different strap colours, blue, yellow, pink and the original black.

Specification
Four operating modes: Time, Freedive, Air, and Nitrox
Dive planning and analysis functions
Compatible with optional Suunto Dive Manager PC software
Automatic safety stop countdown
Complete decompression stop data
Suunto Deep Stop RGBM algorithm
Multi step ascent rate indicator
Battery power indicator and warning
Depth display range: 0-100 m/ 0-238 ft
Glass face, display shield, and lightweight composite housing
Adjustable metric and imperial units
80 hour dive memory

The Gekko can be used with both air and nitrox, and it is designed to give the specifics of any diving situation, including decompression, at a glance.

Suunto Gekko uses the Suunto Reduced Gradient Bubble Model (RGBM) decompression model and has a user-replaceable battery and adjustable metric/imperial units.

It is equipped with a super bright phosphorescent display that can be charged with a dive torch. This ensures that you can easily view the display in dark conditions for extensive periods of time.

Whether diving in familiar waters or exploring unknown oceans, safety is essential. Suunto Gekko is packed with solutions enabling safe and responsible decisions underwater. The depth, time and decompression measurement assure that you know precisely how long you have spend in the depths, how deep you are, when you have to surface and how fast you can do it. This way you can maximize the diving performance without jeopardizing your safety.

The extensive memory functions enable you to keep track of your past dives and through them you can monitor your progress and plan your training accordingly.

Easy-to-use push buttons and a straightforward menu structure make Suunto Gekko simple to operate. The extensive logbook memory stores up to 50 hours of dive profiles and logbook data, including the dive start time and date, dive time, the maximum depth attained and the temperature at maximum depth. Additionally, the dive history keeps track of up to 999 dives and 999 dive hours, as well as the maximum depth ever reached.

Both ascent rate and available no-decompression time are displayed graphically with clear color-coded indicators. Visual and audible alarms are given when necessary. You can also enable maximum depth and dive time alarms.

Features
Air and Nitrox modes
Extensive memory functions
Suunto RGBM model
Audible alarm
Phosphorescent display
Easy and reliable push-buttons
User-replaceable battery

Specification

- Modes of Operation: Air, Nitrox, Gauge, and Free Dive
- Activation: Water or Push Button
- Automatic Safety Stop Prompt
- Cylinder Pressure and Air Time Remaining via wireless transmission
- Audible Alarm
- Alarm Acknowledgment U/W Deactivation
- OceanGlo Backlight – Push Button
- User Replaceable Batteries
- Max Operating Depth 330 ft
- Operating Depth (Gauge/Free Dive Mode) 330 ft
- 12/24 Hour Time to Fly Countdown
- Calculated Desaturation Countdown
- On-Unit Log Capacity 24 Dives
- OceanLog PC Download Included
- OceanLog PC Settings Upload Included
- Temperature Display
- Variable Ascent Rate Bar Graph
- No Decompression Time Remaining Display
- Air Time Remaining Display
- O2 Time Remaining Display
- Transmitter included
- 2 Year Warranty

Features
Decompression calculations are made with the Suunto Reduced Gradient Bubble Model, RGBM.
Monitors and reports dive time, current depth, maximum depth, no-decompression time and ascent time.
Implements the ceiling and floor feature. The Floor is the deepest depth at which the ascent time will not increase. The Ceiling is the shallowest depth to which you should ascend. These depths will provide the range at which the diver most efficiently will utilize the decompression stop.
Offers two patented customizable displays giving you the freedom to choose before each dive what your Stinger displays during the dive. When underwater the chosen displays can be alternated with other displays for 5 seconds by push of a button.
Can be adjusted for diving at altitudes up to 3000 m (10000 ft) and a personal level of conservatism can be added if desired.
Enables you to set dive time and maximum depth alarms before your dive.
Clear blue electroluminescent backlight activates automatically when dive alarms are given, making the dive parameters clearly visible and legible.
Built-in dive planning function helps you to plan your next dive by showing you the no-decompression time data for different depths.
As a nitrox computer the Stinger can be programmed for nitrox mixtures of 21% to 50% oxygen in 1% increments and adjusted for oxygen partial pressure from 1.2 bar to 1.6 bar in 0.1 unit increments. Stinger gives both visual and audible alarms when the limit for oxygen partial presure, CNS or OTU values are exceeded.
For freediving Stinger introduces a one second precision timer with user changeable 2, 4, 10, 20, 30 or 60 second profile memory sampling rates. After 5 minutes of continuous diving in the Free mode the Stinger changes automatically to Gauge mode. In both Free and Gauge mode there is the option to use a run-time timer. This makes Stinger ideal also for technical and military diving.
In Air and Nitrox modes, you get 36 diving hours profile memory with the default 20 second sampling rate setting. This sampling rate can be changed to 10, 30 or 60 seconds using the PC-interface. Profile memory, as well as long-term history data, can be viewed from the Stinger display.
More detailed dive logbook you can download your dives to a PC with the Suunto Dive Manager (SDM) software and interface.
Calendar clock functions, dual time, daily alarm and a stopwatch with elapsed time and split time measurement as a watch
Specification
Stainless steel watch with scratch-resistant mineral glass display.
Triple o-ring pushbuttons and monocase design without separate rear cover make it virtually leak proof.
Pressure rating: 20 ATM (200 m/660 ft).