... , one led on each dot, the light is very soft, and the brightness can be dimmable , not heat generates, the power consumption is ... . Transformer supports 110V - 220V Voltage, AC power 5. Alarm functionVery good choice for using in the office, living room, study, etc ... an internal battery for the clock to work, but the LED does not display. new design multifunctionl led electronic clock 8188D