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 / Zero W / Zero WH. It can also fit in Raspberry Pi 2B/3B/3B+/4B.
4 USB Ports, compatible with USB 2.0 / 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