1. HD display: 1.77-inch TFT high-definition colour screen display, the panel is clearly visible 2. Automatic recording function: Intelligent recording of 6 groups of data, easy to complete the measurement work 3. Energy-saving mode: click the M function key to switch to the backlight setting display brightness adjustable 4. Non-measuring state of the host automatically shut down after 15 minutes 5. The product is compact and widely used Parameter: Product name: TS4520 voltage internal resistance tester (Precautions: prohibited test AC, prohibited test voltage above 45V) Working voltage: DC5V (do not over-voltage power supply), need to provide their own power supply Power supply interface: Type-C, need to provide their own power supply cable Charging module: integrated ternary lithium battery charging module, you can add your own built-in battery Energy consumption: 50mA Display screen: 1.77 inch TFT colour display screen Test Principle: AC 4-wire method Test Fixture: A type USB to Kelvin clip Voltage Test Range: 0.001V~45.00V Maximum Resolution 0.001V Voltage display fine-tuning: support internal resistance measurement range: 0.1m~20.00 Maximum resolution 0.1m Internal resistance display fine-tuning: support Data Recording: 6 sets of internal resistance data can be recorded, automatically recorded when the test clip is disconnected. Auto Power Off: Support 1~9 minutes standby time adjustment. Backlight Brightness: Support 1~9 steps display backlight brightness adjustment. Colour:As Shown Material:plastic Note: Please check as much as possible to make sure the item is what you need. The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 * Host()1 * USB-A to Kelvin clip cable 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.