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Digital travel alarm clock This makes it possible to integrate numerous additional functions that would be difficult or impossible to implement in mechanical or electromechanical alarm clocks. In addition to the usual tasks of digital clocks, in some models, additional alarms can be preset depending on the day of the week or an automatic alarm ...
American Lifetime Large Digital Clock Designed for people with dementia, the American Lifetime Digital Clock has a large, easy-to-read display that shows the date, day, and time.
a digital clock visible on the device's display; a stopwatch that can be used to time activities; randomized "Chatter" messages show when the Ultra is moved after sitting idle for a while; new colors; The Fitbit Ultra is powered by a small lithium polymer battery. [19]
Beginning in 1943, Westclox and other companies introduced clocks for the civilian market that used much less brass than previously. Clocks were labeled as "Waralarm" by Westclox and only referenced city of origin; no mention of maker appeared. Other clock companies also produced clocks that were labeled "War Alarm", such as Gilbert and Telechron.
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These keep time by counting the oscillations of a calibrated tuning fork with a specific frequency. These were only made in battery-powered form. Battery-powered clocks have been made using the schemes above with the obvious exception of a synchronous movement. All battery-powered clocks have been largely replaced by the lower cost quartz movement.