Battery powered clock OR mains powered clock: There are two modes to power the digital clock, you can connect it to the power by the included charging cable with the adapter OR insert 3*AAA batteries (NOT INCLUDED) to enable the clock run. Please be noted that if only batteries inserted, you cant adjust the brightness of the screen and projection lamp and memory function only in AAA batteries power supply Multifunctional Projector Clock: Besides the alarm function, with this clock, you can also know the Time(12/24h switchable), Date, Weekday, Indoor temperature. Designed with large number, you can see the time clearly and easy to read, especially for children and the elderly.
eBay