The Nuvair Pro O2 Handheld Analyzer measures oxygen levels in mixed gases from 1% to 100% oxygen. It comes with a water- and impact-resistant case and is available in three power options: Wall plug-in, 9-volt or rechargeable lithium battery.

When you’re ready for the next level of mermaid monofin power, look no further than our Advanced Monofin Pro (AMP) for adults!

Smart diving GPS watch with versatile sports use and bottle pressure measurement

Excellent Suunto SK-8 compass, willing to work even at higher inclinations.