Easy to use: The usb voltage tester can detect of voltage real-time , current, power and other data is clear, compact, portable and does not require additional power at a glance, suitable for most applications such as mobile phones, power banks, tablets, other electronic products, etc. Basic parameters: This usb voltage tester and current tester use exquisite SMAT technology, use USB power meters, and compatible with QC2.0 / QC3.0 quick charge test, capacity accumulation range: 0 9999mAh, power measurement range: 0 90W. Measuring range: voltage measuring range 3.2 10V, current measuring range 0 3A.Professional manufacturing, strictly made according to factory specifications, perfect size, every piece is strictly controlled. Excellent Durability: The shell of this usb power meter is made of high quality ABS material, it has good wear resistance and high temperature resistance, good transparency, and ensures maximum strength and durability, so the service life is longer.