[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 [Easy to use] By turning the center knob to expected time duration, the 60-minute timer starts counting down [Silently work] visual timer will not make any ticking noise when it is working. 3 alert volumes optional: mute, weak, loud; lasting alarm: 3 seconds/30 seconds [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. 2xAAA batteries required but not included. Power Suplly:2xAAA batteries(Not included batteries) Colour:Blue Material:ABS Size:About 7.8x7.5x4.5cm Package Contents: 1 x Visual Timer