USB3.0 LCD Color Display Tester — inline USB tester with a color LCD and six selectable measurement interfaces. Measures voltage and current behavior under load so you can evaluate cables, chargers, and power banks. Key benefits Verify real-world performance: See how voltage changes when a load is connected so you know if a cable, charger, or power bank maintains stable output under actual use. Check cable quality quickly: Different cables show different voltage drop under load. Use the tester to compare cables and identify high-resistance or low-quality leads. Test power bank health and capacity: Measure how a power bank performs under load to confirm output stability and estimate usable capacity. Easy to read: Color LCD with six measurement interfaces presents data clearly so you can interpret readings at a glance. What it does (functions) Displays voltage and current in real time and shows the drop in voltage when a load is applied. Detects and quantifies voltage drop across cables to assess cable quality. Identifies if a power bank provides stable output and helps evaluate its effective capacity. USB3.0 compatible — designed for use with USB3.0 ports, cables, and USB-powered devices. Six colorful measurement interfaces on the LCD let you choose the display style that best fits your needs. Compatibility and use Works with USB3.0 chargers, cables, power banks, and USB-powered devices. Plug-and-play operation; no special software required. Practical applications Cable selection: Compare multiple USB cables by connecting the same load and observing voltage drop to choose the best cable for fast charging. Power bank verification: Test a power bank under load to confirm it delivers stable voltage and to estimate how much usable capacity it actually has. Charging diagnostics: Troubleshoot charging problems on phones, tablets, or other USB devices by checking voltage and current under load and identifying weak cables or failing chargers. Why professionals and hobbyists use it Provides objective measurements that reveal how devices behave under real load conditions. Helps avoid false assumptions based solely on idle voltage readings. Useful for quality control, repair diagnostics, and informed purchasing decisions. Notes The tester displays changes in voltage when a load is connected and highlights differences caused by cable resistance or weak power sources. Includes an LCD color display with six measurement interface options for clear visualization of readings.