On the onboard side you need a Raspberry Pi board, supported LTE modem, set of LTE antennas and a CSI camera.
We support both full-size Raspberry Pi and Raspberry Pi Zero which might be better option for smaller UAVs.
Check this page to see more details about different Raspberry Pi models.
There a two required connections:
Make sure to use high quality BEC (preferably with fixed output voltage) to avoid system stability issues
Always connect GND to UART header to avoid issues
On the ground side you need an Android device with built-in or external gamepad.
For best experience you might use a suitable phone holder