4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.0    Introduction:            This is 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 .    Features:    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    Operating voltage: 5V    Product Size: 65mm × 30mm    Fixed hole diameter: 3.0m    color: blue    Material: PCB    Package Contents:    1 x USB Hub Extension Board ( not include raspberry pi )    1 x Micro-USB Cable    1 x Micro-USB Adapter        Only the above package content, other products are not included.    Note: 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.