- 	 Extra-Large Easy-Read Wall Clock with Quartz Movement - 13" Diameter! Over-sized 12" diameter face, extra-large numbers & hands are easy-to-read--even in large warehouse! Quartz movement for consistently accurate time to +/- .5 second/month; quick time-adjust dial Impact-resistant Silver ABS case with clear sealed-acrylic crystal for dusty environments Mounts quickly to any wall surface, one AA battery powers clock for months Outstanding value in a quality timepiece for shop, warehouse, office, school and home