The 120-minute Time Timer is an easy-to-use time management tool. To use, simply move the purple disc into position with the centre knob. As time passes, the disc moves clockwiseallowing you to see how much time has passed with a quick glance, and disappearing when time is up. Perfect for timing tests, large projects or presentations, the 120-minute Time Timer offers a volume-controlled alert that sounds when time is up, or it can be silenced for sound-sensitive environments. This Timer is an appropriate size for small groups and individual use measuring 5.5 x 7 and helps make all kinds of everyday tasks easier and more productive: At home use the Time Timer for everything from keeping high-schooled study routines on task, to timing instrument practise and screen use. In the classroom, its great for timing exams, team projects, standardised tests and keeping block classes running on time. In the office, use it to keep track of presentations, team-building activities, personal work productivity and more. Time Timer offers the most clear and accurate visual timers around. A tested and trusted brand, its the preferred time management resource for teachers and other professionals. Dont settle for lower-quality imitations.