Digital Voltmeter Light and portable design, with a large LCD screen 0-20V DC. Accuracy +1 digit. Operates using a 9V battery that is included and pre-installed. Can be used to measure the potential difference between two points Stands 4.5" tall, 5.5" long, 4" wide Digital voltmeter featuring a light and portable design. Large LCD screen for easy reading. 0-20V DC. Accuracy +1 digit. Operates using a 9V battery that is included and pre-installed. Can be used to measure the potential difference between two points. Stands 4.5" tall, 5.5" long, 4" wide. Stands 4.5" tall, 5.5" long, 4" wide.