Battery Internal Resistance Voltage Tester for RV Truck Boat 3.2 Inch TN Color LCD Screen DC0.00V to ±120V 0.000mΩ‑500Ω Item Type: Battery Internal Impedance Tester Product Model: IR502 Screen: 3.2 inch TN Color HD LCD screen with Auto Shutoff Function Battery Types: Acid Battery, Lithium Battery, NiCd Battery, Alkaline Battery Voltage Range: 0.00V to ±120V Impedance Range: 0.000mΩ to 500Ω Maximum Input Voltage: DC120V (no need to distinguish positive and negative poles), Cannot Input AC Current Range: 50mA-50uA AC Measurement Speed: 3 times/second Measurement Signal Frequency: 1KHz Voltage Range Test: Auto or Manual Selection Resistance Range Test: Auto or Manual Selection Test Method: 4 Line Kelvin Testing Method User Self Calibration: Support Factory Reset: Support Lighting Function: Support Battery: 1 x 1250mAh rechargeable lithium battery, continuous working time up to 10 hours (built in battery)