Hightlights: 1. Voltage readings: It can directly inspect whether the charger is standard. 2. Current readings: It can directly inspect whether the charger is fully powered also can check if the USB cable is standard. 3. Smart charging and data communication mode: A: Smart charging mode: Built-in smart charging chip automatically detect the power demand of different device intelligently output the demanded current charging the device quickly by dynamic adjustment ranging from 0.04A - 2.4A saving charging time. In this mode connect to PC it can only charge the device intelligently no USB cable no worries of the virus. No matter iPhone or Samsung or other smart phone when connecting to this charging head they can all be connected and charged through the charging head. B: Data communication mode: In this mode the charging current is lower of equal to 0.5A. 4. Automatically close the input power after fully charged the device to protect the battery of device.