Waterproof stopwatch with 30-lap function, with a convenient case. - Brand: SEIKO - Model Name: DECIMAL - Water Resistance: 3BAR - Functions: 30-lap/split memory - Accessories: Case, strap Thank you for viewing. This item is new and unused, but does not include the instruction manual. The operation has been confirmed, but I do not know how to use it myself and have no opportunity to use it, so if anyone needs it, please consider purchasing. Thank you.