Welcome to our store！</br>1、With LCD design, current, voltage and battery capacity can be display on the same screen, its very convenient and quick to know them. 2、The voltage and current parameters can be read directly by plugging the USB male connector into the micro‑usb of charger, mobile phone and other devices. 3、When the mobile power supply is off, the capacity and energy data can be stored to facilitate the follow‑up inspection and facilitate the measurement of the capacity and energy of the mobile power supply. 4、No need for professional wiring, as long as the USB port is plugged in, you can real‑time detection of USB power charging status, voltage and current capacity and other indicators. 5、9 groups of charging equipment can be input MAH to save power , convenient to check and detect whether the charging equipment capacitance is false data. <div class="wang-edit-text"><p class="wang-edit-text"> Item Type: USB Tester Material: ABS Voltage: 4-30V Current: 0-6.5A Mah: 0-999999 mah Mwh: 0-999999 Mwh Timing: 0-99 hours Power: 0-150W Charging Resistance :0-999.9 ohms Grouping: 1-9 groups Internal Temperature: 0-80 ℃ D Positive Voltage: 0-10V D Negative Voltage: 0-10V Keypad:&nbsp;Function button Interface: USB How to Use:&nbsp; 1. Click the button to view the charging data saved by groups 1-9. 2. Long press the button for 3 seconds to clear the charging data saved by a single group 3. Quickly double click the button to change the display page 4. Long press this button and then plug it in to enter voltage calibration <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> </div> 1 x&nbsp;Digital USB Voltmeter Tester1 x Manual Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>