You do not see time fly with this clock and calendar because it has no visual readout. The clear male voice announces the time and date. It has been designed to be set and used by anyone, even individuals who have absolutely no vision. Using the 4 easily identifiable buttons, anyone can program the clock and calendar, the alarm and the hourly report function. You have a choice of 11 different alarm sounds. Once set, the protective cover can be put on so the user does not reset the clock by mistake. Uses a 9-volt battery, not included. Dimensions: 5 1/2 x 3 x 1 3/4 inches.