● Fun Timer: It takes about 90 seconds to 180 seconds for each bubble to reach the bottom. Use the kitchen timer if you need an accurate time measurement. ●Helps to relax nerves, relieve anxiety, and focus your mind. Set of 3 colors (Blue & Green / Pink & Yellow / Blue & Pink); Take a breath in one corner of your study desk. It will keep you calm when you look at it. Makes a great gift. Suitable for interior use.