FNIRSI USB Tester 4-24V 6.5A LCD USB A&C Voltage Current Power Display Multimeter with App Software, Fast Charge Detection Trigger,

**** The FNIRSI USB Tester 4-24V 6.5A LCD Voltage Current Multimeter has received an enthusiastic reception from users, particularly for its robust capabilities in diagnosing USB charging issues. Many customers find it easy to use, making it an invaluable tool for anyone dealing with electronic devices and chargers. Users appreciate the tester's ability to display detailed data, such as voltage, current, and wattage, over time, which can be instrumental in troubleshooting charging problems. The device's compatibility with various charging protocols, including PD and QC, allows users to accurately assess different setups and compare performance in a way that isn't possible with standard meters. The interface is intuitive, and while some users mention that it may take a bit of time to familiarize themselves with advanced settings, they generally find it a straightforward, user-friendly device. However, there are some important Considerations to keep in mind. A few users reported an issue regarding the PD COM switch being on by default, which can inadvertently lead to higher output voltages beyond what some devices can tolerate. Moreover, the lack of a manual upon initial release caused some confusion, although a corrective measure was taken with an update in the form of an online manual. Another aspect noted was the backlight functionality, which does not stay on continuously, requiring users to press a button to activate it. Despite these minor setbacks, overwhelmingly positive feedback regarding the tester's accuracy and performance has solidified its status as a must-have device for tech enthusiasts. Many users commend its high-quality design and build, recommending it for anyone needing precise monitoring and troubleshooting of USB charging. **