Features: brand new and high quality This is for raspberry Pi USB hub , and integrated USB to serial port function , suitable for raspberry pi 3 / 2 / B+ / Zero / Zero W. It will make you get rid of the trouble of lack of USB port on your raspberry pi , expecially for raspberry pi zero . 4 USB expansion ports, compatible with USB2.0 / 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 interface. Specifications: Operating voltage: 5V Size: approx. 65x30mm/2.56x1.18in Fixed hole diameter: 3.0m Color: Blue Material: PCB Note: Only the above package content, other products are not included. Light shooting 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. Package includes: 1 x USB Hub Extension Board ( not include raspberry pi ) 1 x Micro-USB Cable 1 x Micro-USB Adapter