ADVPRO cnc2001-b Round Numerals Illuminated Edge Lit Bar Beer Neon Sign Wall Clock with LED Night Light Overall diameter/ length of the Clock is 10 inch/ 25cm. The clock face is engraved with transparent acrylic plastic and the clock is see-through without any background The CE certificate clock movement runs on one AA battery (not included). Only one color for one clock, default color is Blue For the LED lights, we provide a 110v US plug to US & CA, 240v UK plug to UK, 240v EU plug to EU, 240v AU plug to AU & NZ The source of the light is LED light, which is bright & energy saving, lifespan is more than 100,000 hours (around 10 years if you keep on turning it on) ADV PRO Clocks are carved by the latest 3D, Surface and Line engraving technologies (attractive in all directions). We do not use the laser engraving method which only provides 2D surface effect