The numbers are typically electronic and either flip over or blink as each second passes. The quality and style depends on some electrical source to power it. It can be powered by batteries, solar power or electrical outlet power. These clocks can be seen in the dark as the screen is typically back lit.
This kind of clock can be made in any design that the designer would like. These clocks are sometimes fashioned out of plastic and isn't as flamboyant as a traditional clock.
These were a trend initially and everybody went out to buy one, but what happened over time was that an entire generation that grew up during this age could not read time using traditional methods. The trend started to go down and today they are still sold but not en masse the way that they were before.
This type of clock needs energy of some form to run so the cost of purchasing it might not be a great amount but the cost should be considered. These clocks used to be a familiar item in most American houses, however with the arrival of other technologies and other appliances which has digital clocks becoming scarcer. A digital wall clock is typically functional but might not be of the best quality craftsmanship
