Overview1. This is a 4 port USB hub for Raspberry Pi, provides more USB capability to your Pi, whats more, it features USB to UART converter for easy serial communication.2. It can work with various versions of the Pi, and the size of the board is designed to perfectly fit the Zero / Zero W.USB HUB HAT Features1. 4 USB Ports, compatible with USB2.0/1.12. Onboard USB to UART, convenient for Raspberry Pi serial debugging3. Onboard multi indicators, for monitoring the status of power, USB to UART, and each USB portWhat is on the USB HUB HAT1. Raspberry Pi GPIO interface: For connecting Raspberry Pi2. USB to UART: For controlling the Raspberry Pi via serial terminal3. USB HUB interface (bottom): For connecting the HUB to the Raspberry Pi USB port- Raspberry Pi Zero / Zero W: Connected via Micro USB connector- Raspberry Pi B+ / 2B / 3B / 3B+: Connected via Micro USB cable4. 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 converterSpecifications1. Operating voltage: 5V2. Dimension: 65mm * 30mm3. Mounting hole size: 3.0mm4. Package contents:- USB HUB HAT x1- Micro USB connector x1- Micro USB cable x1- RPi screws pack (2pcs) x1Specification: Package Weight One Package Weight 0.09kgs / 0.19lb One Package Size 9cm * 5cm * 3cm / 3.54inch * 1.97inch * 1.18inch Qty per Carton 624 Carton Weight 15.00kgs / 33.07lb Carton Size 54cm * 40cm * 39cm / 21.26inch * 15.75inch * 15.35inch Loading Container 20GP: 316 cartons * 624 pcs = 197184 pcs40HQ: 734 cartons * 624 pcs = 458016 pcs