This is an advertising wall clock. It is 8.75" in Diameter & uses one AA battery. The front lens is made of glass. This is is a great clock for your garage, Bar or Man Cave. If you need this faster than my advertised delivery date then you will need to contact me prior to buying. Please ask all questions before purchase. I don’t do meet-ups or pick-ups. I don’t do cancellations after you commit to purchase so please don’t ask. Thanks for looking at my clock. New York Mets Baseball Bar Man Cave Wall Clock Sign