Product Description: 【Auto Set & Extremely Accurate】No need to manaully set, atomic wall clock can automatically update the date and time with zero error after you install the batteries. Without the complicated settig, this large display digitial wall clock is excellent for seniors. 【14.2" Large Digital Wall Clock with Backlight】 With large easy to read numbers, large digital clock can be seen at any angle. Featuring a built-in ambient light sensor, once it is dark at night, the screen will automatically light up, allows you can see the time in the dark. User-friendly design, there are 2 levels of adjustable brightness in the dark for your choice. Also, you can turn it off. 【Battery Operated Digital Wall clock】This digital clock is powered by 4 AA batteries and 2AA batteries (Included), you can put the clock wherever you like. There are two keyholes for easy wall mounting and a fold-out backstand for tabletop or shelf placement. 【Multi-function Use】The battery operated digital clock has 3 modes: timer, alarm, clock. You can just press mode button to change the mode, easy to operate. There are 3 alarm settings for wekdays, weekends, everyday to meet your different needs. As for the timer function, available timing period for 0-29 hr 59 min 59 sec to serve your needs. 【Temperature & Date display】12 or 24 hour display formats with indoor temperature display in ℃ or ℉, meet your various needs. Easy to set, just press the "+/12/24"button to change 12H to 24H and press the "-/℃/℉"button to change ℃ to ℉. Great choice for home decor, office, classroom.