The Robin Day Clock in the 20.3 cm (8 inch) size is a mains powered digital day clock, supplied in black and in white. It shows the time with the day, the date and the part of the day, and the display can instead be set to a digital or analogue clock face or to the day of the week alone, using one of seven themes across ten languages. Alarms and reminders carry a written message of the owner's choosing, each with its own sound, volume, duration and repeat days, and a snooze button sits on top of the clock. Tactile side buttons can be locked to prevent accidental changes, the clock announces the time aloud on request or at set intervals, and the screen dims to a schedule. It measures 21 cm wide by 16.5 cm high and either stands on a surface or hangs on a wall.

The practical value lies in how much the screen states without interpretation, namely the day, the date and the part of the day in plain words, with a written reminder appearing when it is due. Side buttons that lock keep alarms and settings from being changed by accident, and scheduled dimming keeps the clock readable without lighting a bedroom through the night.