You can easily distinguish the morning and the afternoon with the AM/PM icon at the 'TIME' number pad.
One of D-type battery, which is not included and must be purchased separately, is needed to operate. The average life span of a D-type battery is about 5 months.
A classical interior retro flip clock with the number pad flips over as time passes.
If the number pad is separated, bend the separated number pad slightly and fit into holes on both sides. Please refer to the image on product detail page under "Notice" for detailed instructions.