... for customers like Coca Cola,Pepsi etc Specifications of Neon Clock1. Voltage: input 110~130V or 220~240V ... 9”, 12”,15”,17”,19”3. Single neon or double neon4. Any color neon tubes around: white, blue, yellow, red, ... . Glass surface, electroplate chrome frame or plastic frame6. Neon tube powered by adaptor (included).7. Requires one AA ... just for advertising, not for commercial aim. wall clocks quartz