Parameter: The parameter: AC resistance, Basic accuracy: Voltage: 0.5%, Resistance: 0.5% Measuring range: Resistance: 0.0001mQ~200Q, Voltage: 0.0001V~100VDC Signal source: Frequency: AC 1kHz, Current: 2mQ/20mQ range 50mA; 200mQ/2Q range 5mA; 20Q/200Q range 0.5mA Range: Resistance: 6 ranges automatic and manual, Voltage: 3 ranges automatic and manual Test speed: 5 /sec Correction: Resistance: each range is individually and manually calibrated without affecting each other Voltage: each range is individually calibrated manually, without mutual influence Factory settings: save the factory information, one key can the factory state Backlight: Enter the setting to turn off and on Energy saving setting: 30 minutes delay, automatic shutdown without any operation Scope of application: cell phone, computer, electric vehicle and other battery maintenance, inspection and testing Display : LCD display, direct reading Power supply: built-in lithium battery, using 5V/A charging (for Android mobile phone charger) Size: length, width and height=166 x 80 x 28mm Weight: 173.5g Language: Chinese, English, can switch at will Option: computer test software, free update Material: plastic Color: As Shown Package Contents: 1 x lithium battery voltage internal Resistance Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.