The PiicoDev® Adapter for Raspberry Pi is a great way to connect sensors to your Raspberry Pi. Use the on-board PiicoDev connectors to quickly and easily connect with the PiicoDev family of sensor modules without soldering. If you're connecting to a Pi 400, we recommend using a GPIO extension cable. Dimensions: 22x51mm
PiicoDev connector pinout:
1 GND
2 3.3V
3 SDA
4 SCL