Oris Aquis Pro 4000m Titanium 49.50mm Watch

1. Activating RSS Hold the bezel's black vulcanized rubber edge and then lift it. This will release the RSS's lock and the bezel's black ceramic minutes scale top ring. When activated, a stainless steel ring will appear around the edge of the top ring. 2. Setting the timer With the stainless steel ring now visible, turn the top ring anti-clockwise and align the number on it that corresponds to your allocated dive time with the watch's minutes hand. 3. Securing the time Once in place, push the top ring down until it clicks into position. The timer scale is now secure and you are ready to begin your dive.