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Time.is

天天

小时小时

分钟分钟

秒钟秒钟

time.is/1700m

How to use this timer

When the timer is stopped, press timer numbers to change timer duration.
When the timer is running, press timer numbers to stop the timer.

键盘快捷键

enter	start/stop timer (or reset, when timer is finished)
esc	reset timer
backspace	reset timer
F	切换全屏显示
shift D	切换暗色模式
shift S	切换声音开关