Note : 2*AAA batteries required but not included Easy to understand: The colored disk of this visual timer will disappear as time passes; It is super easy to understand for young kids and will help people develop a good sense of time Silently work: The visual timer will not make any ticking noise when it is working; 3 alert volumes optional: mute, weak, loud Easy to use: By turning the center knob to expected time duration, the 60-minute timer starts counting down Suitable for many occasions: It can be used as a study timer for kids, it can also be used as a kitchen timer, a task timer, meeting timer, or exercise timer More about timer: The indicator light will flash to remind of low power of batteries; 2*AAA batteries required but not included; If there are any problems with our products, please seek advice from us, we will provide you with satisfying solutions