Comprehensive USB Power Testing: A professional USB voltage and current meter designed for precise measurement and analysis of various fast charging protocols, including PD3.1 and PPS. Accurate Voltage and Current Monitoring: Real-time display of voltage, current, power, capacity, and energy of USB power sources and devices. Helps you detect abnormal voltage drops, current instability, and verify whether chargers and cables meet their rated performance. PD3.1 Fast Charging Protocol Detection: Supports PD3.1 fast charging protocol identification and negotiation. Easily view the voltage/current profiles supported by chargers and power banks. PPS and Multiple Fast Charging Protocol Support: Supports PPS (Programmable Power Supply) protocol detection and other mainstream fast charging protocols from major brands (depending on charger/device compatibility). Quickly identify protocol types to help confirm fast charging status and compatibility issues. Ripple and Spectrum Display: Built-in ripple and spectrum analysis functions provide a visual representation of power ripple conditions and noise distribution. This helps assess power quality, identify unstable power sources, and protect sensitive electronic devices from long-term damage caused by poor power quality. (The product printed words may vary depending on the batch, but this does not affect use) Color: As Shown Material: CNC Package Contents: 1*USB Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.