Suitable for insulation resistance testing of cable, motor, generator, transformer, mutual inductor, high voltage switch, arrester and other large equipment.Insulation resistance measurement (IR); polarization index measurement (PI); absorption ratio (DAR); ramp test mode(RAMP) ; filtered resistance test (FR); Voltage measurement(V); current measurement(nA) 1.Model No.:ETCR3500B 2. Insulation Resistance Range: 0.5MΩ~5TΩ 3. Rated Voltage: 250v~10Kv(6 gears) 4. Shout Circuit Current: >5mA MAX 5. VoltageTest Range :AC/DC 0V~1000V 6. Power Supply : Rechargeable lithium battery pack 5.2Ah 14.8v