FUNCTIONS: 1)COUNTDOWN TIMER. 2)DISPLAY THE PERCENTAGE COLOMN 3)VOLUME BIG. 4)MAGNET/STICKER/STAND INSTALLATION THIS PRODUCT IS SUITABLE FOR SOME TIME LIMITED OCCASIONS.SUCH AS:SPORT GAMES,HOME COOKING,FEE FEED FOR CAR PARK.WHEN COUNTDOWN BEGIN,THE SCREEN WILL DISPLAY THE PERCENTAGE COLOMN AND DIGITS FOR REMAIN TIME.WHEN COUNTDOWN TO "0",IT WILL RING FOR 30 SECONDS AND THE PERCENTAGE COLOMN WILL STILL TWINKLE AS REMIND OF FINISH.PRESS ANY KEY TO STOP.PRODUCT MODELS AND FUNCTION 1.DT2804-01 60 SECONDS COUNTDOWN &nb sp; DISPALY: XX S 2.DT2804-02 120 SECONDS COUNTDOWN DISPLAY: XXX S 3.DT2804-03 300 SECONDS COUNTDOWN DISPLAY: XXX S 4.DT2804-04 30 MINUTES COUNTDOWN &nb sp; DISPLAY: XX M 5.DT2804-05 60 MINUTES COUNTDOWN &nb sp; DISPLAY: XX M 6.DT2804-06 90 MINUTES COUNTDOWN &nb sp; DISPLAY: XX M 7.DT2804-07 120 MINUTES COUNTDOWN DISPLAY: XXX M 8.DT2804-08 0-9999 SECONDS COUNTDOWN DISPLAY: XXXX S 9.DT2804-09 0-9999 MINUTES COUNTDOWN DISPLAY: XXXX M10.DT2804-10 0-99 MINUTES 59 SECONDS COUNTDOWN DISPLAY: XX:XX M11.DT2804-11 0-99 HOURS 59 MINUTES COUNTDOWN DISPLAY: XX:XX H