Relife XA1 Current and Voltage Digital Tester detects current and voltage and automatically identifies all common fast charging protocols currently on the market such as PD, QC2.0, QC3.0, SCP, AP2.4A and DCP. Thanks to the multiple parameters displayed on its screen, you can easily check in real time, the current, voltage as well as the fast charging protocols of various chargers, data cables, laptops, mobile phones and other digital devices.