This product can trigger the voltage of different gears in the PD charging to supply power to external devices, such as routers, optical modems, set-top boxes or laptops (the adapter should be replaced when the power of the PD charging is satisfied) It can be used for batch testing and aging of PD charging manufacturers. How to adjust the voltage in stepping voltage regulation mode: First make sure that the stepping gear indicator (20mv 100mv 1v) is all on/on one of them; Long press the K2 button to enter the voltage regulation, the digital tube voltage value flashes, first activate the 1V stepping gear regulation; Long press K2 again to switch the stepping gear; After selecting the corresponding stepping gear, short press the K1/K2 button to modify the voltage; when the stepping gear indicator is all on, short press the K1/K2 button to exit the voltage regulation mode and select other voltage gears Bit 5s without any key operation or long press K1 button for 2s, it will automatically return to the running interface; This product has a power-off memory function, time the power is turned on, it will remember the voltage range and PD mode before the power-off. Colour: black Material: plastic Size: 61x25x13mm Package Contents: 1 * USB Charging Trigger Only the above package content, other products are not included. Note: Light 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.