12-inch luminous silent wall clock, Battery Operated(need to bring a carbon 1pcs AA battery,not included) Luminous function, you can clearly see the time in no light at all. The duration is about 5 hours and it will gradually become darker. At this time, you need to absorb the light energy again; so after you receive the product, please let it be exposed to the outside to absorb it. Do not block the light. It needs to be to have luminous at night. The it absorbs, the brighter it is! of luminous function: The main raw material of luminous is light-induced energy luminous powder, which stores light energy after being irradiated by natural light, fluorescent light, ultraviolet light, etc. Get up, after stopping the light irradiation, it is slowly released in the form of fluorescence, so you can see the light at night or in the dark. Quiet movement, time, bid farewell to mechanical ticking, very suitable decoration, living room, bedroom, office, etc. Fine workmanship, sturdy and durable, beautiful and generous, exquisite and fashionable, three-dimensional numbers, clear scale display, it also shows a strong and artistic effect size:Diameter 30cm Material:Wood colour:Wood color Package Contents: 1 * Wall Clock Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.