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 2.5.Clear and easy to read scale and a button for fine tuning the dial.Product Name : Analog AmmeterModel : SO-45Mount Size : 37 x 37mm/ 1.5 x 1.5inch (L x W)Meter Face Dia.(Approx) : 45mm/ 1.8inchThread Size : 4.5mm/ 0.18inchOverall Depth : 47mm/ 1.9inchNet Weight : 46g(1.6oz)Color : BlackMaterial: MetalMeasuring Current Range : AC 0-3AAccuracy : Class 2.5Package 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.