Long setting countdown time: 999 , 23 hours, 59 minutes and 59 seconds.Upgraded version: bigger size. LCD screen size:13.8cmx4cm/5.4x1.6in.It will alarm for sixty seconds when arriving at your setting number.With clock function. You can switch between 12 and 24 hours .Easy to set.Two ways to place it. With magnet back and movable bracket.Wide application: vocation, wedding, new baby, retirement, meeting, study, and so on.How to set clock:Hold the CLOCK button until you see the clock number "hour" flashing.Press UP/ or DOWN to adjust that particular number.Keep hitting CLOCK to set minutes - seconds.Press CLOCK again to .In the CLOCK mode, press the DOWN button to switch between 12 and 24 hours .How to set countdown time:Hold the SET button until you see a number flashing. the SET button until you to the number you to change.Press UP/ or DOWN to adjust that particular number. / or DOWN, the number will change quickly.Keep hitting SET until the screen stops flashing.Press the UP/ button to or pause the counting down.Press and hold the UP/ and DOWN buttons at the same time to reset to 0.Requires: Internal 2 x CR2032 batteries (Included)Colour: blackMaterial: ABSSize: about 15.5x5.7x1.1cmPackage Contents:1 * Digital timer clockOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed is +/- 1-3cm.