This AC 0-3A Panel Ammeter is specially designed for measuring Ampere and monitoring battery and electrical system, easy to use.Measures current range of AC 0-3A with accuracy of Class 25.Clear and easy to read scale and a button for tuning the dial.Product Name : Analog AmmeterModel : SO-45Mount Size : 37 x 37mm/ 15 x 15inch (L x W)Meter Face Dia.(Approx) : 45mm/ 18inchThread Size : 45mm/ 018inchOverall Depth : 47mm/ 19inchNet Weight : 46g(16oz)Color : BlackMaterial: MetalMeasuring Current Range : AC 0-3AAccuracy : Class 25Package Include:1 x Analog Ammeter with Installing PartsNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.