Multifunctional: This USB tester is designed to detect the voltage, current, capacity, power, power, temperature, resistance, charging time and other data of USB C devices, which is convenient for power supply and quality testing. Detect various fast charging protocols: Type-C USB tester supports QC2.0/3.0/4.0, Super VOOC, and supports electrical signal monitoring in PD2.0/3.0 fast charging protocols to meet the needs of various mobile phone users. [Guaranteed measurement data] The power-off function can save the capacity and energy data when the mobile power is turned off, which is convenient for subsequent viewing, and it is also very convenient to measure the capacity of the mobile power. Wide Applicability: This USB C tester measures voltage: 4V-30V; measures current: 0-6.5A. YOJOCK tester is widely used in the quality inspection of 3C digital peripheral products, and is the first choice for digital gamers and electronics enthusiasts. [Key function] 1. Press the button to switch the screen in a circular manner; 2. Double-click the button to rotate the displayed content; 3. Press and hold the button (3 seconds): clear all capacity, power, and time. Model Number: Type-c voltage tester Material: plastic colour: black Package Contents: 1 x usb c power meter tester