Wall Clock Size: The retro wall clock measures 12 inches, suitable for any space, each clock is equipped with a hook on the back, easy to hang on the wall. Note: This product does not come with a battery. Please prepare one AA battery in advance so that you can use the clock immediately. High-Quality Material: Noamus aqua battery operated quartz clock is mainly made of high-quality plastic, durable and sturdy, not easy to crack or break, which ensures it can serve for a long term. Requires one AA battery (not included), easy to install.