The Mares SIRIUS HUNTER is a rugged spearfishing computer designed for passionate underwater hunters. It combines exceptional durability, intuitive two-button operation, and advanced freediving functions - including deep sequential alarms, pool training modes, and Bluetooth connectivity - to deliver performance and reliability dive after dive.

SIRIUS HUNTER – The Ultimate Spearfishing and Freediving Computer

The Mares SIRIUS HUNTER is a rugged spearfishing dive computer designed for passionate underwater hunters.

Built to perform in every environment, it combines robust construction, advanced freediving features, and intuitive operation — the ideal companion for both apnea training and deep-sea adventures.

Key Features

• Extremely robust build – reinforced case, high-resistance materials, and tactile buttons for use in any underwater hunting condition
• Large, clear mineral glass display – 1.3" diagonal (33 mm), chip-on-glass technology for optimal visibility
• Simple two-button menu – fast, intuitive navigation, even with gloves
• Freediving training & pool functions – chrono, countdown, lap timer, silent mode for full concentration
• Deep sequential alarms – developed for advanced equalization techniques
• Comprehensive freedive logbook – records up to 10 hours of profile at 0.5-second sampling rate; visualize dives in the Mares/SSI App
• Bluetooth connectivity – update firmware, upload dives, and review graphs directly on your smartphone
• User-replaceable battery (CR2450) – 200–300 hours of use
• Interchangeable straps – replace with bungee (sold separately)
• Daily use watch functions – date, time, alarm, time zone

Watch Style

Compact, wearable convenience, combining daily watch functionality with advanced dive monitoring, travel ease, and a stylish, discreet design.

User-replaceable Battery

User-replaceable batteries allow quick, convenient changes anywhere, keeping your dive computer ready to use.

Connectivity

Built-in Bluetooth connects to the Mares app for effortless dive uploads, detailed logbook tracking, and automatic firmware updates.

Specifications

• Battery type: CR2450
• Battery duration: Approx. 200 – 300 hours of diving
• displayed depth: 100 m / 328 ft
• Ascent rate indicator (m/min - ft/min): no
• Gas switching: no
• Stopwatch: yes
• Watch: yes
• Dual Time: no
• Daily Alarm: yes
• Plan Mode: no
• Choice of Metric / Imperial units: yes
• Fresh and Seawater Settings: yes
• Residual Nitrogen Reset: no
• Option To Exclude Audible Alarms: yes
• Exclusion of "Uncontrolled Ascent": no
• Altitude Adjustment: yes
• Resolution: 0.1m until 99.9m and 1m at depth deeper than 100m. Resolution in ft is always 1ft
• Temperature: -10 °C to +50 °C / 14 °F to 122 °F
• Logbook Memory: 200 hours of dive profile at a 0.5-second sampling rate
• Clock: Quartz clock, time, date
• Upgradeable software: yes
• Air integrated: no
• Graphic and Numeric Tank Pressure: no
• USB Charger: no