Product Name: Analog Voltmeter;Model: SO-45;Measuring Current Range: AC 0-300V Accuracy: Class 2.5;Meter Face Dia.(): 45mm/ 1.8;Thread Size: 4.5mm/ 0.18 Overall Depth: 47mm/ 1.9;Mount Size: 37 x 37mm/ 1.5 x 1.5 (L*W) Color: Black;Net Weight: 52g Material: plastic Measures voltage range of AC 0-300V with accuracy of Class 2.5.Clear and easy to read scale and a button for fine tuning the dial. Package Contents: 1 x Analog Voltmeter Several Installing Parts: Several Installing Parts Only the above package content, other products are not included. Note: 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.