Digital insulation tester + digital multimeter Panel calibration, auto range 3 3/4 digits, maximum display: 3999 Overload protection overload With backlight, indication of dimension and function symbols Can directly measure insulation resistance test voltage Insulation resistance: 200k ~ 40G Accuracy: 200k~ 200M3%5, 200M~4G5%5, 4G~40G10%5 Voltage test: 250 V/500 V/1000 V Short circuit current: not less than 1.5 mA Test time selection: 1/2/10 min (min) DC voltage: 400 m/4/40/400 V 0.5% 5, 1000 V 0.8% 5 AC voltage: 4 /40/400 V 0.8% 5, 700 V 1% 5 Continuous current: 40 mA/400 mA 0.8% 5 Current AC: 40 mA/400 mA 1% 5 Resistance: 400/4k/40k/400k0.8%5, 4M1%3, 40M3%3 Capacitance: 40 n/400 n/4 u/40 uF 3% 5 F frequency: 40/400/4k/40k/400k/4MHz0.5%3 Continuity test diode Dimensions: 17015664mm Power supply: AA1.5V6 Weight: approximately 650g ( battery included)