Features: brand new and high quality This is a 4 port USB hub for Raspberry Pi, provides more USB capability to your Pi, what's more, it features USB to UART converter for easy serial communication. It can work with various versions of the Pi, and the size of the board is designed to perfectly fit the Zero / ZeroW / ZeroWH.It can also fit in Raspberry Pi 2B/3B/3B+/4B. 4 USB Ports, for USB2.0/1.1. Onboard USB to UART, with enable / disable switch, convenient for Raspberry Pi serial debugging and avoiding conflict. Onboard multi indicators, for monitoring the status of power, USB to UART, and each USB port. Specifications: Operating voltage: 5V Dimension: 65mm 30mm Mounting hole size: 3.0mm Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1Set x USB HUB hat