な 1 - the product indicates it is supporting USB PD, but not which version of USB PD. For example, it is not clear whether the device supports USB PD3.0 PPS.- the product does not indicate the which charging protocol is being used.- the product does not allow rotation of the information by clicking on a button; with most power connections of laptops on the left hand side, the display will always be upside down.- As the manual states, it does not support USB data transmission. This means that not only it does not support USB devices which are directly powered, it also does not support docking stations.- The manual states that the device supports two display modes, but does not explain the second display mode.Only useful measuring power consumption from a USB adapter.