Feature: 1. The tester can switch five digit or six digit display with one key, the maximum resolution is 0.00001, and can monitor the subtle changes of voltage, current, and power during the charging process in real time; in addition, the differential pressure method is used to measure the cable resistance, and it can be easily detected when used with constant current loads. Cable resistance. 2. The tester with USB3.0 interface, 9 pin design, can be backward compatible with USB2.0, and the transmission rate is USB2.0+ times，which can also directly test the charging protocol of some mobile phones without using a primary data cable. 3. The tester can record 10 sets of measurement data. You can use the obtained data to calculate the battery capacity. You can also directly add the calculation formula to the tester. The result is multiplied by 1000 to get the battery capacity. 4. This is a tester that supports reading E Marker and DASH line data. After connecting the data line, you can easily read the chip of E marker and DASH line. 5. The tester supports the screen flip function, through the gravity sensor, the screen can be flipped freely, you can also turn off the gravity direction recognition, long press the middle button to flip the screen. Specification: Item Type: USB Voltmeter Ammeter Material: PCB+LCD+ABS Purpose: Multifunctional Fast Charge Tester Model: FNB48 Monitoring Voltage: 4-24V Monitor Voltage Resolution: 0.00001V Monitoring Voltage Accuracy: ±(0.2%+2) Monitoring Current: 0-6.5A Monitor Current Resolution: 0.00001A Monitoring Current Accuracy: ±(0.5%+2) Monitoring Power: 0-156W Monitor Current Resolution: 0.00001W Monitoring Current Accuracy: ±(0.5%+2) Load Equivalent International Resistance: 0-9999.9Ω Load Equivalent International Resistance Resolution: 0.0001Ω Load Equivalent International Resistance Accuracy: ±(0.5%+2) Capacity: 0-9999.99Ah Power Consumption: 0-9999.99Wh Cable Resistance: 0-9999.99Ω D+/D- Voltage: 0-3.3V D+/D- Voltage Resolution: 0.001V D+/D- Voltage Accuracy: ±(1.0%+2) Equipment Temperature: ℃ ℉ Equipment Temperature Resolution: 1℃ 1℉ Equipment Temperature Accuracy: ±(1.2%+3)/±(1.2%+4). Package List: 1 x FNIRSI-FNB48 PD Trigger Note: 1. This APP only supports for Android 5.1 and above, BT 4.0 and above, and does not support for IOS system temporarily. Since the device uses a BLE BT module, it cannot connect to FNB48 through system settings. You need to search for the connection in the APP.2. The lower the ripple, the better the quality of the charging head and the lower the damage to the battery.