Easy to Use -- Turn the dial clockwise to adjust the time. To turn the timer off-simply turn back to zero. Requires 2 "AAA" batteries (Not Included). It 's so simple, it' s easy for old people and kids to use. Quick setting: For quick setting, 5 minutes, 20 minutes and 30 minutes are preset. Press the small button on the top to set quickly kitchen timer Multi-function timer: count up, count down,just press that knob can count up the time, or first set a good time, and then press the knob, you can countdown ,settable time range 0-99 minutes 50 seconds Mute and ringtone:Press and hold the small button at the top to mute or cancel,volume 0-70db Great for classroom, home, and office settings. Makes an excellent classroom timer, countdown timer, study timer, toddler timer, kids timer, silent timer, kitchen timer, timer clock, time , and more! Colour:White Material:ABS Size:60 x 35 x 70mm Package Contents: 1 x timer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.