This electrostatic detector can be used in the qualitative measurement of whether there is static electricity on the surface of the target object. It is widely used in the measurement of static electricity on the surface of masks, non-woven fabrics, plastics, films, rubber, fiber composite plates and other products.Features:Professional Electrostatic Tester: non-contact electrostatic qualitative testing gauge for quickly detecting the surface static of the object.Mini Palm Size: easy to operate by single hand, convenient to carry around.Three Indicator Light: green for power, red for positive charge and blue for negative charge.Power Supply: powered by 2pcs CR2030 battery, low power consumption.Wide Applications: it is widely used in the measurement of static electricity on the surface of masks, non-woven fabrics, plastics, films, rubber, fiber composite plates and other products.Specifications:Material: ABSWorking Temperature: 0~50Sensing Range: 100V~20KVMeasuring Distance: 10mm (optimal)Respond Time: 1~3sMeasuring Method: Handheld non-contact measurementPower Supply: 2 * CR2030 batteryItem Size: 80 * 60 * 25mm / 3.15 * 2.36 * 0.98inItem Weight: 58g / 2.05ozPackage Weight: 92g / 3.24ozPackage Size: 11 * 8.3 * 4.4cm / 4.33 * 3.27 * 1.73inPacking List:1 * Electrostatic Detector1 * Manual (English)