Set timer for 4 min. Start the online timer set for four minutes (240 seconds). Fullscreen. Sound alarm notification is optional.
How to use 4 minutes timer
Simply start the timer and it will tell you when your four minutes has run out. The clock will keep counting upward when time is up.
Sound notification (alarm) is optional. You can keep the timer running in the background if you for example open a new tab. If you have sound notification the timer will tell you when time is up.