1Made from premium materials, non-toxic and available for long service life. 2Easy to operate. First, Rotate the timer clockwise to the zero scale. Then turn it back to the number of minutes you want counterclockwise. When the time is up, it will ring automatically. 3This timer is great for use in salons, offices, labs, schools or in the kitchen. 4Enjoys a loud ring, which can easily be heard from across the room. 5Timer can be set up to 60 minutes.