The SparkFun Qwiic pHAT Extension for the Raspberry Pi 400 provides you with a quick and easy solution to access all of the 400's GPIO, stack your favorite HAT right-side up, or connect a Qwiic-enabled device to the I²C bus (GND, 3.3V, SDA, and SCL). Since the Qwiic system allows for daisy-chaining boards with different addresses, you can also stack as many sensors as you’d like to the mounting holes on the pHAT to create a tower of sensing power!

The Qwiic pHAT Extension connects to the Raspberry Pi 400's GPIO using a 2x20 right angle header and extends out to the edge of the PCB. Two Qwiic connectors are included on each side of the board for easy access to the I²C bus. A set of large silicone bumpers have also been included for better stability when connecting the Qwiic pHAT Extension to the Raspberry Pi 400's GPIO port.

See link below for video breakdown of the details:
https://www.youtube.com/watch?v=EjGmLbmaQeM&feature

Note: The Raspberry Pi 400 is NOT included. Check the Hookup Accessories section below for Raspberry Pi 400 options.