Web5 minutes 30 seconds timer countdown. No ads, big, clean and free to use. Full screen and dark mode supported. Webfeb 28, 2018 · this 5 minutes 30 seconds timer alerts you with a sound when the time is up. You may press the restart button to set the timer for 5 minutes 30 seconds once. Webclick the start button to start the timer. Use the box below to create a new timer. Webthe 5 minute and 30 second timer is the perfect way to stay on track and never…