Product introduction: This circuit analyzer is a special test device designed for AC low-voltage distribution line quick fault location. With simple operation, accurate measurement and other features, it can detect multiple problems on a line, such as causing to electric shock, electrical fire, abnormal operation of equipment, etc. Features: 100% new and high quality. True RMS measuring. Measures voltage : Line,Ground-to-Neutral,Peak,Frequency. Measures voltage drop under 5A& 65292;8A and 10A loads. Measures Hot, Neutral and Ground conductor impedances. Identifies proper wiring in 3-wire receptacles. Tests RCD for proper operation. (Test the reliability of residual current device (RCD) and response action time) Tests GFCI for proper operation. (Test the reliability of residual current device (GFCI) and response action time) Backlight : yes Data Hold : yes The product is available in four specification plugs to suit your needs in different countries. EU specification plug. & 65288;220V& 65289; US specification plug. & 65288;110V& 65289; UK specification plug. & 65288;220V& 65289; AU specification plug. & 65288;220V& 65289; Specifications: Power Supply : 6 x 1.5 V AAA Batteries(Not Included) Plug type: EU plug or US plug or UK plug or AU plug Voltage: 220V OR 110V Size : 192*72*35mm Color: Green & black Package Includes: 1 x MASTECH MS5908 Tester. 1 x test lead. 1 x English manual. 1 x gift box.