The Agata wall clock features Acctim's Smartlite Technology. The Smartlite sensor automatically lights up the display as the room darkens for easy night-time viewing. The Smartlite sensor turns the light off during the daytime to prolong battery life. What a clever little clock! Features include: Smartlite technology automatically illuminates dial for easy night time viewing. 265mm Diameter. Silver case with Glass lens. Quartz movement. Dimensions H.W.L 268 x 268 x 53mm