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 tracker, and more! Colour: White Material: ABS Size: 60 x 35 x 70mm Package Contents: 2 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.