12 Hour Digital Alarm Clock. Press the buttons on the left to set the Green Display to the time of day. The green LED indicates PM. Press the buttons on the right to set the Blue Display to the time alarm should go off. The Blue LED indicates PM. When the time of day matches the alarm time the RED LED lights which indicates the ALARM. When you initially turn the clock on it will say 0:00. Cycle thru the hours it will go from 12 to 1.
