General characteristics (1)Display: 90 48mm LCD display, the maximum display is "1999". (2)Over range indication: Only the highest digit shows "1" when the upper limit is exceeded. (3)Measurement method: Double integral type A / D conversion. (4)Sampling rate: About 3 times /second. (5)Power supply: 5 # battery LR6 (1.5V) 8 (with external power adapter) .It contains lack of voltage indication when the voltage is not enough. With automatic shutdown function (only for MAX DC1000V OUT function, about 15 minutes after machine start). (6)Power consumption: Power consumption of empty load test <300mw. (7)Using environment: Temperature 0 -40 , humidity 30% RH-85% RH. (8)Dimensions:175(L)x110(W)x70(D)mm. (9)Weight:750g(NOT Battery included). (10)Attachment: 1 no Manual, 1 no Insulation meter, 1 no certificate, 1 no package box, one pair of 10A testing pen (60B +), one pair of crocodile clip ) Median resistance 250V/500V : 2 M 1000V: 5M Voltage measurement AC750V (1% readings+6 unit) Hole plug position Insulation resistance: L.E AC750V: ACV G AC750V Input resistance: 1M. AC750V Frequency response:(50200)Hz Note:Median resistanceEnsure that the measurement two end voltage is not lower than the lower limit of the resistance measurement of 90% of the nominal value of the test voltage.