Just set it and go! Parents, teachers and therapists will reach for this super simple timer again and again to support a wide variety of tasks/activities that could benefit from being timed. Sets easily with the twist of just 2 dials: from 5 min. to 2 hours. Offers unique visual, (glowing colored dome lights), and auditory, (alarm), indicators as time counts down. Volume of alarm can be adjusted or turned off completely for purely visual timing. so many uses at school and home, you probably need more than one!