The Ratio II Free Diver Professional 200M Sapphire Quartz Men's Watch won’t give you critical information a dive computer alike; do not expect it to calculate decompression periods or bottom time or the safety stops; but well, it will surely measure your dive time and keep you informed about the remaining cylinder air. It is not meant for the great depths; only 600 feet or a little more.
https://www.kiwibox.com/ratiowatches/blog/entry/145407555/ratio-ii-free-diver-professional-200m-sapphire-quartz-36j/
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