A High-Quality Retro Style Double Tube TRUE Neon Clock. Dimensions: 18 3/4" diameter x 5.5" deep. Molded resin, plastic housing with High Quality Polished Chrome Finish. Two hand blown Real Glass True Neon Tubes. One neon on the outside to coordinate with sign color. One Bright White neon on the inside to illuminate the clock face, making the clock face truly readable. Quartz Clock movement with Sweep Second Technology (No Tick-Tock noise. Smooth, 100% Quiet). Protective True glass lens. Classic pull-chain neon lights on/off switch. Neon lights powered by UL listed A/C adapter (included); High-Grade neon power supplies for long-lasting neon life. Clock requires one AA battery (not included).