Our QT Py boards are a great way to make very small microcontroller projects that pack a ton of power - and now we have a way for you to turn many QT Py boards into powerful 9 degree-of-freedom (9DoF) motion plus pressure/altitude sensing projects that are super small!We call this the Adafruit BNO055 + BMP280 BFF - a "Best Friend Forever." When you were a kid, you may have learned about the "buddy" system; well, this product is kind of like that! It's a board that will watch your QT Py's back and give it more capabilities.This PCB is designed to fit onto the back of any QT Py or Xiao board. It can be soldered into place or made removable using pin and socket headers.