1 Voltage and Current Measurement: The USB male connector is connected to a 5V charger, the female connector is inserted into a mobile phone or other equipment, and voltage and current parameters are read directly. Measure the quality of the MicroUSB cable: Connect the mobile phone and other equipment, first connect the 5V charger with the male connector, then read the voltage, then insert the MicroUSB cable from the 5V charger into the device's MicroUSB port to record the voltage. The smaller the voltage difference, the higher the quality of the MicroUSB cable. Measure the output capacity and efficiency of the power: Connect the first power to the mobile phone, turn on the power, press and hold the button until the capacity data returns to zero, insert the phone multiple times until the power turns off automatically. The screen capacity is mAH for the mobile power next time the unit is turned on. Note that this mAH is bea Data Change: Click the button to switch to the next data set, then double-click the button to switch to the previous data set. Delete Data: Press and hold the button for more than 3 seconds to delete band data. No need for professional cable pulling, easy to use, just plug in the USB port, charge out and charge in, you can monitor the device's working current and voltage and calculate the battery capacity. 1. It can detect the charging capacity of tablet and mobile phone batteries, determine how much the battery performance has decreased, and whether it needs to be replaced. 2. It can detect the power undervoltage capacity and calculate the power conversion rate. 3. It can detect the charging current for your digital device. 4. Working current for 5V router and other 5V USB port devices (such as USB lamps), etc. Supplied with a USB input line, there is also a USB port microUSB, you can use other lines for input. One end is connected to power/mobile power, note that the standard is to use the USB interface, that is, 5V; the other end is connected to the load, which can be a mobile phone. Parameter: Input Voltage: 3V-15V Voltage Resolution: 0.01V Test Current: 0.05A-3.50A Current Resolution: 0.01A Capacity Range: 0-19999mAH Accuracy: ±1% Line Loss: Approximately 0.1 ohm Test Content: Battery voltage, current, undervoltage capacity (total 10 sets of data) White color Shipping Quantity: 1 piece