The PD3.1 protocol supports a maximum fast charging output of 140w, that is, the maximum output parameter is 28V5A. The PD3.1 unidirectional step-down module may have certain voltage requirements. If the module needs to output 28v5a requires an input voltage between 28-32v. Because this module can only the output, you need to pay attention to whether you have a power supply with a suitable voltage before purchasing. Otherwise, you will not be to reach the maximum output of 140w. Similarly, if you input 12v, you will not be to Output 20v5a. The chip uses IP2736+MPKM9928, which has also been tested for a long time and has stable performance. NOTE: Depending on the batch, the appearance/color/batch number of components may be different, which does not affect use. Material: PCB+components colour: B-Purple + transparent, 3-with Acrylic shell Package Contents: 1 x Fast Charging Module with Acrylic shell 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.