RUIFA Indoor Quiet 8-Inch Precedent Decorative Wall Clock with Arabic Numerals (Green) Not all batteries are created equal,please use carbon zinc batteries only. voltage:1.5V.For examples: panasonic voltage:1.5V DO NOT USE heavy duty, alkaline battery,rechargeable batteries.These batteries are not recommended due to fluctuations in the way these types of batteries disperse power.For example:Duracell alkaline battery Quiet Wall Clock,Super-quality Quartz Sweep Movement guarantees accurate time and absolutely quiet environment 8 inch round wall clock features dial,Frame: plastics; Hands: metal; Dial: PVC Powered by 1 AA carbon battery that is NOT included; A fine addition to any office or household