Neon operates from a 110~240V power adapter (included) Real quartz clock movement operates by one AA battery Detail Description: 1) Voltage: 12V AC 500mA 2) UL and CE certified adaptor 3) Wide array of neon tube colors and frame colors to match perfectly with custom Logos 4) Can be made according to customer's requirements 5) Size: A) 12" metal clock B) 15" bottle cap clock C) 17" tower shape clock