ESCO Detector Meter, Measuring Device, Tester, Voltage and Current, Insulation Resistance; Electrical Detection Range: AC 250 V; Working Frequency: 50 - 60 Hz; Function: Electrostatic, Polarity, Grounding Check; Ambient Operating Temperature: 32 - 104 °C; Insulation Resistance: Over 100 MΩ (between blade and case at DC500V); Withstanding Voltage: AC1 V Touch Screen (Except for frame): When storing blade: 1.6 x 3.5 x 0.8 inches (40 x 90 x 20 mm); Blade protruding (W x D x H): 1.6 x 4.1 x 0.8 inches (40 x 105 x 20 mm); Weight: Approx. 2.1 oz (60 g).