6 hours
A 6-hour timer counts down a long interval to zero and immediately converts it to minutes and seconds in the interface for convenience. Intuitive start, pause, and reset buttons provide quick controls. You can expand the timer to full screen and adjust the countdown ending sound, or turn it off completely.
The tag works equally stably on phones, tablets, and computers. When switching tabs, the timer does not stop, and the remaining time is duplicated in the page title.