The DJI system is the state of the art consumer unit basically. With the caddx unit it's especially small (to fit on smaller quads): https://www.quadcopters.co

The DJI system is the state of the art consumer unit basically. With the caddx unit it's especially small (to fit on smaller quads): https://www.quadcopters.co.uk/dji-hd-digital-fpv/iflight-succex-d-f7-twing-fc-50a-4in1-stack-2-6s-for-dji-hd-fpv-system https://www.quadcopters.co.uk/dji-hd-digital-fpv/iflight-suc... The silver box and the camera are the relevant parts, the connection to the other PCB is just to receive telemetry from the flight controller. Edit: better link to the actual unit itself: https://www.buildyourowndrone.co.uk/caddx-fpv-air-unit-micro-version https://www.buildyourowndrone.co.uk/caddx-fpv-air-unit-micro...