Welcome to the store! Features: This is a USB hub for Raspberry Pi, with an integrated USB to serial port function, suitable for Raspberry Pi 3 / 2 / B+ / Zero / Zero W. It helps you overcome the problem of insufficient USB ports on your Raspberry Pi, especially for the Raspberry Pi Zero. 4 USB expansion ports, compatible with USB 2.0 / 1.1 transmission. USB to UART for Raspberry Pi for serial debugging. Multiple indicators for easy access to power, USB to UART, and USB expansion interfaces. Specifications: Operating Voltage: 5V Size: Approx. 65x30mm/2.56x1.18in Fixed Hole Diameter: 3.0mm Color: Blue Material: PCB Note: Only the above package contents are included; other products are not. Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real item. The allowed measurement error is +/- 1-3cm. Package includes: 1 x USB Hub Extension Board (does not include Raspberry Pi) 1 x Micro USB Cable 1 x Micro USB Adapter Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately, and we will provide you with the best solution!