This handheld, non-contact meter indicates the electrostatic field voltage and polarity on charged surfaces. Can be used to measure voltages on packaging materials (bags, foam, plastic wraps, etc.), storage bins and boxes, furniture and fixtures, material handling equipment, and clothing. Measures up to 20,000 volts with an of accuracy ±10%. Easy-to-read 3-1/2 digit LCD display automatically updates three times per second. Equipped with a Power On/Hold button and Zero button. Built-in 1" spacer ensures meter is at proper distance for accurate and repeatable measurements. Comes with 9V battery, carrying case, and Certificate of Calibration.