Our 14" Classic Altimeter Wall Clocks are made to simulate as closely as possible a primary flight instrument. Each Clock dial closely represents that of a the particularflight instrument.Features:Injection molded from high impact styrene and features a plastic lensWe use a high quality American made Quartz clock movement for accuracy which will provide many years of reliable service.For best performance please use a high quality Alkaline battery.One "AA" alkaline battery required.This product comes with a one year warranty.Dimensions: 14" Diameter