1、MULTIPLE FUNCTIONS: This USB meter can measure parameters such as voltage, current and capacity, and can display temperature, which is convenient and practical. 2、EASY OPERATION: Plug the USB male into the charger and the female socket into the mobile phone and other devices to directly read the voltage and current. 3、LCD SCREEN: The LCD displays the current, voltage and battery capacity on the same screen, and the color screen display makes it clearer and easier to read. 4、SIMPLE CONNECTION: Plug in the USB port to detect the charging status of the USB power supply in real time, no other wiring is required, convenient and reliable in operation. 5、PORTABLE DESIGN: This USB tester has a compact size and uses an excellent plastic shell, which is resistant to wear and aging, and has a long service life.