Digital Thermometer, C/F Display Exchange. Unit Size: 66*30*14mm More Items: /gift_clock_2.htm. Cedar Electronics Limited is a manufacturer of consumer electronics & gifts, supply digital calendars, calculators, LCD clocks, LED clocks, weather station clock, talking clock, projection clock, radio controlled clock, digital timer, game players, novelty radios, digital video cameras, portable multimedia player, electronic gifts & promotion items.