DescriptionThis module is specially designed for Raspberry Pi IO expansion Modules. It can effectively solve the problem, which is for Raspberry that can't send IO port sufficiently.Feature- Color: As Shown. - Material: PCB+Electronic Component. - Size: 6x6x2cm - Connection: The IO extend adapter module is capable of connecting with same module infinitely. - Wiring PI API & Sample Code: It uses wiring PI API and sample code. - Stable Connection: SPI interface ensures the stability and smoothness of connection. - Data transmission super stable without stuck or cut. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!