Mini Tiny LCD Projector Projection Digital Clock with Key Chain Ring - Black Mini Projection Digital Clock.High intensity LED light beam for projector. LCD clock projects onto any surface.Pocket size with key ring for easy carrying Three display modes: Hour/ Minute, Month/ Date or only Second "M" switch for displaying mode, "S" switch for adjusting For clearer projection, please operate in the dark with projection distance from 1 to 2 meters.Button cell included