Radio controlled wall clock: classic wall clock, DCF radio signal with automatic and exact time adjustment for maximum accuracy, no manual setting required.Easy to use: the operating voltage of the clockwork is 1.5 V (1.3-1.7 V). Insert the battery, hang the radio controlled clock on the wall and that's it. After a few seconds the clock starts to adjust itself. The process may take a few minutes but then it runs quietly and accurately.Silent: perfect silent wall clock for living room, office, classroom, bedroom, bathroom, restaurant, family room, study, kitchen, conference room or any room you want to decorate.Design: different colors bring different visual experiences, the diameter is 30 cm, the 3D Arabic numerals are large and clear, which will surely attract the attention of visitors and receive more praise.