CASIO Digital Watch with Countdown Timer Function - Brand: CASIO - Model: AE-1300WH Referee Watch - Functions: Alarm, Stopwatch, Countdown Timer, Water Resistant - Color: Black - 10-Year Battery Thank you for viewing. I purchased this watch new, with a new battery, for around 5,000 yen and used it for about a year for soccer refereeing and coaching. I am selling it because I upgraded to a new watch. There are about three scratches on the screen, but they are not noticeable enough to affect refereeing. (I tried to capture them in the fourth image, but I couldn't get all the scratches to show up due to the lighting. Please understand this before purchasing.) It was working perfectly until yesterday. It's more like a stopwatch with a count-up timer, rather than just a countdown timer. When set to 20 minutes, the timer starts counting up after the 20-minute alarm sounds, which was convenient for measuring the last 59 seconds of a game or managing intervals. It was also useful for measuring additional time because you can stop and start the timer when the game time is stopped due to injuries, etc. Please check the manufacturer's website for more information on the functions. The box and instruction manual are missing, so only the items in the photos will be shipped.