As shown in the picture, the accessory can provide two scroll wheels and a button. It USES a USB interface, plug and play. In addition, we have added a 6-pin terminal block to facilitate your expansion of program functions.
You can get the source code from the Google drive.
*All goods will be charged by weight, excluding shipping and other charges. We will calculate according to the lowest cost in your country/region. If there is a purchase, we will charge you again when we confirm the order.