Features 1、4 USB Ports, compatible with USB2.0/1.1. 2、Onboard USB to UART, convenient for RPI serial debugging. 3、Onboard multi indicators, for monitoring the status of power, USB to UART, and each USB port. 4、This product is a 4‑port USB hub with FE1.1s as the main control chip, and it also integrates the function of USB to serial port. 5、For you solve the for Zero/Zero W's annoyances of plugging into a variety of USB devices, and of course it can be used on other models as well for RPI. Specification Description: This is a 4-port USB hub for Zero / Zero W, provides more USB capability to your for Pi, what's more, it features USB to UART converter for easy serial communication. The size of the board is designed to perfectly fit for the Zero, it can also work with any other versions of the for Pi. Features: 1. 4 USB Ports, compatible with USB2.0/1.1. 2. Onboard USB to UART, convenient for RPI serial debugging. 3. Onboard multi indicators, for monitoring the status of power, USB to UART, and each USB port. 4. This product is a 4‑port USB hub with FE1.1s as the main control chip, and it also integrates the function of USB to serial port. 5. For you solve the for Zero/Zero W's annoyances of plugging into a variety of USB devices, and of course it can be used on other models as well for RPI. Specifications: Operating Voltage: 5V Dimension: Approx. 65 * 30 mm / 2.6 * 1.2 inch Mounting Hole Size: Approx. 3.0mm / 0.1in Package Weight: About 74g Package Contains: 1 * USB HUB HAT 1 * USB Connector 1 * USB Cable 1 * Screws Pack (2pcs) How to use: Take for Zero W as an example: 1. Plug the module to the 40Pin GPIO connector on the for Zero Board. 2. Plug the USB connector to both the USB ports on the for Zero W and the USB HUB HAT. 3. For serial connection: connect the "USB to UART" port to your PC with a USB cable and the LED will be turned on. Then install the driver on your PC. Now you can access your for Pi using serial connection (you should enable shell and kernel messages on the serial connection). 4. Attach USB devices to the USB1~USB4 ports and the corresponding LED will be turned on to indicate working state. Note: 1. There are two USB ports on the USB HUB HAT. Only the "USB HUB" (but not "USB to UART") connector is used for USB expansion. 2. You have to attach the USB HUB HAT to a for RPI B+/2B/3B with a USB cable although the module can be attached to a for Pi Zero W with the USB connector. 3. If you cannot access your for Pi using serial connection, try to enable the serial option in "sudo raspi-config". 4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.