Question about Casio Sports - AE-1300WH-8A

The watch has up to nine countdown timers (interval timers) that you can customise individually, each with a maximum duration of 59 minutes and 55 seconds. Additionally, it offers preset countdown timer intervals of 10, 12, 15, 20, 25, 30, 35, 40, and 45 minutes, which are selectable but fixed presets. So, you can use either preset timers or fully customisable interval timers for your countdown needs.