Multifunction: Large LCD display can show time, 12/24 hour format, C/F temperature, humidity, alarm and countdown. Compact and portable: l clock is powered by two AAA batteries (not included), no wires or plugs required Timer function: Press "TIME" button once to select 12/24 hour, 1 minute and 10 minute touch screen buttons to enter timer setting directly. For example, if you need an 11-minute alarm sound, just press the "10" button once, then the "1" button once. Easy to Read and Use : time display with large numbers and can be easily read while taking a shower or putting on makeup. Slow cooking, slow roasting or barbecuing can even be programmed with this handy device. The total countdown is 99 minutes.