Features High-Accuracy Measurement Tool: This VU meter header delivers precise readings, ensuring optimal performance for your audio equipment and enhancing sound quality User-Friendly Pointer Dial: The intuitive design allows for easy interpretation of measurements, making it an essential tool for both beginners and professionals Durable Construction: Made from high-quality, wear-resistant materials, this DB amplifier header is built to withstand regular use, ensuring longevity and reliability Nighttime Visibility: Featuring a bright orange 12V 55mA bulb, this device provides clear visibility in low-light conditions, enabling accurate monitoring at any time Versatile Application: Ideal for DIY projects, recording studios, and car audio transformations, this testing tool adapts to various setups, making it a must-have for audio enthusiasts Features: 1、Coupled with a unique accuracy algorithm, the accuracy and stability of the power tester are ensured at the hardware and software level. 2、This USB C power tester supports recognizing the fast charging protocols for QC2.0/QC3.0/PD/SAMSUNG. 3、The voltmeter has a power？off storage function, thus it can store capacity and energy data when the power is off. 4、With a 0.96in IPS high？definition color liquid crystal display screen, the data is very clear for viewing. 5、The practicability allows for flexible application, including smartphone, computer, portable power bank and so on. Specification: Item Type: USB C Power Tester Product Material: ABS Product Model: KWS-1902C Colour: Black Voltage: DC4-30V Current: 0-5A Capacity: 0-999999mWh Load Resistance: 1-9999.9Ω Voltage Resolution: 0.002V Current Resolution: 0.002A Power: 0-150W Product Interface: USB C 24pin Display Screen: 0.96in Color Screen Test Direction: Two-way Support: QC2.0/QC3.0 Applicable Temperature: 0-80℃ Timing: 0-99 hours Product Size: Approx. 55 x 26.5 x 6mm / 2.2 x 1 x 0.2in How to Use: 1: Single short pr once to change the display page; 2: Quickly double-click the button to rotate the display page 3: Long pr the button for 3 seconds to clear all saved data; 4: Charging Direction Indicator: The color of the arrow and the scroll speed follow the current; Small but changes, the order of current from small to large: green, yellow, orange, red, the larger the current, the faster the scrolling speed, and the direction indicator will not be displayed when there is no current. 5: Current and Voltage Calibration Method: You must use a standard voltage of 5.000V to pr and hold the button to power on. When the "Factory setting" is displayed on the screen, you can release the button and the product will automatically calibrate. Calculation Method of Mo Package List 1 x USB C Power Tester 1 x User Manual