I've forgotten the purchase date and location. I used it indoors for the Pomodoro Technique (e.g., 25 minutes on, 5 minutes off, for 10 sets). SEIKO Solar Interval Timer, with 300-memory function and 5 BAR water resistance. - Brand: SEIKO - Model: Solar Interval Timer - Water Resistance: 5 BAR - Features: 300 memory - Timer Settings: Interval timer - Accessories: Strap Thank you for looking.