High-Definition Display: 1.77-Inch Tft High-Definition Color Screen Display, The Panel Is Clearly Visible; Automatic Recording Function: Intelligently Record 6 Sets Of Data To Easily Complete The Measurement Work Energy-Saving Mode: Click The M Function Key To Switch To The Backlight Setting And The Display Brightness Is Adjustable The Host In Non-Measuring State Will Automatically Shut Down After 15 Minutes. The Product Is Compact And Widely Used. Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Description: 1. Product name: TS4520 Voltage Internal Resistance Tester 2. Note: It is forbidden to test AC power and voltage above 45V. 3. Working voltage: DC5V (do not overvoltage power supply), you need to bring your own power supply 4. Power supply interface: Type-C, you need to bring your own power supply cable 5. Built-in battery: No built-in battery 6. Charging module: Integrated ternary lithium battery charging module, you can install a built-in battery by yourself 7. Working energy consumption: 50mA 8. Display screen: 1.77-inch TFT color display 9. Test principle: AC 4-wire method 10. Test fixture: Type A USB to Kelvin clip 11. Voltage test range: 0.001V~45.00V, maximum resolution 0.001V 12. Voltage display fine-tuning: supports internal resistance measurement range: 0.1mΩ~20.00Ω, maximum resolution 0.1mΩ 13. Internal resistance display fine-tuning: supported 14. Data recording: 6 sets of internal resistance data can be recorded, automatically recorded when the test clamp is disconnected 15. Automatic shutdown: supports 1~9 minutes standby time adjustment 16. Backlight brightness: supports 1~9 levels of display backlight brightness adjustment 17. Cable length: USB to Kelvin c