Digital school voltmeter which is perfect for any physics laboratory. Light and portable design with a large LCD display. Can be used to measure the potential difference between two points in a circuit. Powered by a 9V (PP3) battery (included).DC Voltage Range: 0-20VResolution 0.01VAccuracy: +1 digit. Dimensions: (H)114mm x (L)140mm x (W)102mm (4.5"" x 5.5"" x 4"")