The item is powered by adapter only and comes with a EU (220V) to US (110V) outlet plug adapter. Countdown timer: With the countdown timer that can be set from 99 min, it is easy to set the desired time based on your needs. Ideal for daily use such as cooking, exercise and when taking a nap or for special events like new year's eve. To set the countdown timer, first press TIMER button. Then, press and hold MODE button to set the countdown time. It automatically changes the brightness as low level in the dark space, and changes as the high level in the bright place due to the built-in sensor that detects the light. All controls on the clock are made up of small remote controls! (Calendar, Alarm, Temperature, Stopwatch, Countdown, 12/24H mode). Clear high brightness LEDs are distributed throughout the module and are excellent in readability. Able to adjust the luminance in 3 levels. (High-Medium-Low). 3D module design that separates the pieces that are slightly right-handed, which fulfills the role of a sophisticated, three-dimensional interior object. Mooas 3D LED Wall Clock Big Plus Dual (Orange/White).