Set it and go! You and your students will reach for this super simple timer to support a variety of classroom activities. Offers unique visual and auditory indicators, including a warning alarm. Operates easily with just 2 dials: total alarm time and warning time. Total alarm time ranges from 5 minutes to 2 hours , in 5 minute increments. Counts down until the colored light glows and the alarm sounds. Volume can be adjusted or turned off if you prefer visual timing only.