PD decoy module uses 2721 hardware PD chip, can't be upgraded, can't change voltage, can't solve compatibility problem PDC004 uses a hardware PD identification chip.The identification logic of this identification chip is: tricking to trigger a fixed voltage.However, if the voltage that needs to be deceived is , the voltage be applied to file. For example: 15v product PDC004, your PD power supply is only 12V,Or no 15v next file is 12v,then the scammer apply to 12v. PD spoofing is a communication format, there be no spoofing of higher voltages, and no voltage be boosted or stepped down. It does not have the ability to change the power, voltage, and current of the power supply. Note: 1. The hardware chip randomly apply for voltage, for example, you need a 15V model. It may produce other voltages 2. Hardware chip, can not be upgraded, can not choose voltage 3. Does not support charging head information reading 4. Does not support other gears except for fixing a few voltages, such as gear 5. You forced a 12V tablet computer with 15V, causing the computer to overheat and cause a fire. 6. Does not support gear arbitrary voltage selection 7. Does not compatibility with most charging heads type:12V Colour:blue Material:PCB+metal Package Contents: 2 x PD decoy module 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.