Battery Resistance Tester 3.2in TN Display DC0V ‑ ±120V 0mΩ ‑ 500Ω Automotive Battery Tester DC5V Item Type: Battery Resistance Tester Material: ABS Voltage: 0.00V - ±120V Internal Resistance Measurement: 0.000mΩ - 500Ω Maximum Input Voltage: DC120V (non polarized), do not input AC Measurement Current: 50mA - 50uAAC Measurement Speed: 3 seconds/time Measurement Signal Frequency: 1KHz Voltage Range Selection: Auto, Manual selection Internal Resistance Range Selection: Auto, Manual selection Self Connection Optional: Yes Measurement Method: Four wire test method User Self Calibration: Yes Self Manufacturing Factory Reset: Yes Battery Selection Standard: Acid battery, lithium battery, ni cadmium battery, alkaline battery Screen and Size: Approx. 55 x 57mm / 2.17 x 2.24in TN black and white screen Power Supply: 1 x lithium ion battery 1250mAh (built in) Battery Model: N A Charging Voltage: DC5V Lighting Function: Yes Other Features: Low voltage detection, white backlit, automatic shutdown