This is a 4 port USB hub for , provides more USB capability to your , what's more, it features USB to UART converter for easy serial communication.It can work with various versions of the , and the size of the board is designed to perfectly fit the / W / WH.It can also fit in 2B/3B/3B+/4B.4 USB Ports, compatible with USB2.0/1.1Onboard USB to UART, with enable / disable switch, convenient for serial debugging and avoiding conflictOnboard multi indicators, for monitoring the status of power, USB to UART, and each USB portOperating voltage: 5VDimension: 65mm x 30mmMounting hole size: 3.0mmWhat's on the USB HUB HAT1. GPIO interface: for connecting 2. USB to UART: for controlling the via serial terminal3.USB HUB interface (bottom):for connecting the HUB to the USB port / W / WH: connected via -USB connector(check packing list) B+ / 2B / 3B / 3B+ /4B: connected via -USB cable(check packing list)4.USB extended ports: USB1~USB45.USB port indicators: dedicated indicator for each USB port, D1~D4 for USB1~USB4 respectively6.Power indicator7.USB to UART indicator8.FE1.1S: USB HUB chip9.12MHz crystal10.CP2102: USB to UART converterDevelopment Resourceshttps://..//USB_HUB_HATColour:blueMaterial:PCBPackage Contents:1 x USB HUB HAT1 x -USB connector1 x -USB cable1 x RPi screws pack (2pcs)Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.