Feature: 1. Screen Flip Function: The USB voltmeter supports screen flip function, through gravity sensing, the screen can be flipped freely, or you can turn off the gravity direction recognition and long press the middle button to flip the screen. 2. Differential Pressure Method Measurement: This USB voltmeter can measure cable resistance using the differential pressure method. Use with constant current load to easily detect cable resistance. 3. Realtime Monitoring: One key to switch five or six digits display, maximum resolution 0.00001, can monitor the subtle changes of voltage, current and power during charging in realtime. 4. Downward Compatible: With USB3.0 interface, 9 pin design, backward compatible with USB2.0. No need to use primary data cable, also can directly test the charging protocol of some phones. 5. Measurement Data Recording: USB voltmeter can record 10 sets of measurement data, and you can use the obtained data to calculate the battery capacity. Add the calculation directly to this product, and the result multiplied by 1000 is the battery capacity. 6. Easy Reading: USB voltmeter supports reading for E Marker and for DASH line data, you can easily read the chip of for E Marker and for DASH line after connecting the data cable. Specification: Item Type: USB Voltage Meter Material: ABS Use: Multifunctional rapid charging tester Model: FNB48 Monitoring Voltage: 4 to 24V Monitoring Voltage Resolutions: 0.00001V Monitoring Voltage Accuracy: ±(0.2%+2) Monitoring Current: 0 to 6.5A Monitoring Current Resolution: 0.00001A Monitoring Current Accuracy: ±(0.5%+2) Monitoring Power: 0 to 156W Monitoring Current Resolution: 0.00001W Monitoring Current Accuracy: ±(0.5%+2) Load Equivalent International Resistance: 0 to 9999.9Ω Load Equivalent International Resistance Resolution: 0.0001Ω Load Equivalent International Resistance Accuracy: ±(0.5%+2) Capacity: 0 to 9999.99Ah Power Consumption: 0 to 9999.99Wh Cable Resistance: 0 to 9999.99Ω D+ or D- Voltage: 0 to 3.3V D+ or D- Voltage Resolution: 0.001V D+ or D- Voltage Accuracy: ±(1.0%+2) Device Temperature: ℃ or ℉ Device Temperature Resolution: 1℃ or 1℉ Device Temperature Accuracy: ±(1.2%+3) or ±(1.2%+4) . Package List: 1 x USB Voltage Meter