This is model is a holder to mount a Raspberry Pi 3A with a Camera Module 3 to a monitor to use it as a webcam. You can follow this tutorial from Raspberry Pi to turn your Pi into a webcam: [https://www.raspberrypi.com/tutorials/plug-and-play-raspberry-pi-usb-webcam/](https://www.raspberrypi.com/tutorials/plug-and-play-raspberry-pi-usb-webcam/) You need to power your Pi from the USB A Port, if you want to use it as USB device, because the micro USB port lacks the necessary data wires.