Eco-Drive uses light as power to drive watches; Eco-Drive is a registered trademark of Citizen Holdings Co., Ltd., a Japanese corporation. Each Eco-Drive watch is equipped with the word Eco-Drive or the corresponding logo. . The full English text of Eco-Drive is Ecology Drive, which means promoting and maintaining the ecological environment. Citizen hopes to bring the concept of environmental protection to the public through light-driven watches. At the same time, Citizen is also the first company in the watch industry to obtain environmental certification. Photokinetic energy watches can absorb any visible light source and convert it into kinetic energy to drive the watch. They do not use the batteries of ordinary quartz watches, which avoids environmental pollution caused by discarded batteries and does not require regular replacement of batteries, which brings convenience to the wearer. The power-saving function of the photo-kinetic energy watch ensures that when the watch is fully charged, it can operate normally in the dark for several months to ten years depending on the movement model.

The radio wave means that the watch can automatically search for the radio wave to check whether the time is ready or not, just like a radio, but some places in the country cannot receive the radio wave. Photodynamic battery watch: A radio-controlled watch is a watch that uses the built-in radio wave receiver and antenna to receive the "standard time" radio waves emitted by the transmitting tower, obtain data such as time and calendar, and automatically correct the time and date of the watch. Citizen's radio-controlled watches all use photo-kinetic energy movements. When there is light, there is energy. As long as the radio wave can be received, there will never be an error. There is no need to manually adjust the time and date. Photo-kinetic energy-controlled radio-controlled watches bring all-round convenience to consumers.

Photokinetic energy radio wave = photokinetic energy + radio wave time reception function