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.

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

Why choose the SIRIUS HUNTER
Whether you’re training for apnea performance or exploring deep spearfishing grounds, the SIRIUS HUNTER freediving computer delivers reliability and precision you can count on.
Developed and tested by spearfishers, it reflects the Mares commitment to “Innovation with Purpose” – technology that connects you closer to the ocean.
“Built by spearfishers, for spearfishers.” – Paolo Acanti, Mares Product Manager and passionate spearfisher.

• Battery type CR2450
• Battery duration Approx. 200 – 300 hours of diving
• Max. displayed depth 100 m / 328 ft
• Stopwatch
• Daily Alarm
• Choice of Metric / Imperial units
• Fresh and Seawater Settings
• Option To Exclude Audible Alarms
• Altitude Adjustment
• 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
• Upgradeable software