1.77-inch TFT HD color screen for clear visibility Auto-records 6 data sets for easy measurements Energy-saving mode with adjustable backlight via M key Auto-shutdown after 15 minutes of inactivity Compact design for versatile use **Model:** TS4520 voltage/internal resistance tester **Warning:** Do not test AC power or voltages above 45V **Power:** DC5V (no overvoltage); requires external power supply (Type-C cable not included) **Battery:** No built-in battery; supports optional self-installed ternary lithium battery **Display:** 1.77-inch TFT color screen **Testing:** AC 4-wire method, 0.001V-45.00V range (0.001V resolution), 0.1m��-20.00�� resistance (0.1m�� resolution) **Features:** Data fine-tuning, 6-set auto-recording, 1-9 min standby adjustment, 1-9 level backlight control **Included:** USB-to-Kelvin clip test cable (650mm) **Package:** 1 �� Tester (no battery/cable included) **Note:** Slight color variations may occur due to lighting/screen differences. Tolerance: ��1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store