Keweisi USB Current and Voltage Tester – Precision Power Monitoring
Accurate real-time measurement of USB output with 0.01V voltage resolution and 0.001A current precision for optimal charging diagnostics. High-definition LCD screen displays voltage, current, power, capacity, and charging time simultaneously with clear visibility in low-light conditions. Durable ABS+PC shell with polished edges and compact lightweight design (45g) for portability in travel, labs, or daily troubleshooting. Universal compatibility with USB-A ports, testing power banks, adapters, car chargers, and cables to verify performance or detect energy drain. Plug-and-play operation—no batteries or setup required—ideal for engineers, DIY enthusiasts, and tech-savvy consumers ensuring safe charging speeds.