This is the new Caddx Vista Air Unit is designed to work with the existing DJI Digital HD FPV System. Cutting down on the size and weight on the original Air Unit, the Vista squeezes in at 20x20 and Whoop (25.5x25.5) mounting holes sizes. This makes DJI Digital HD an viable option on smaller toothpick class frames AND much easier mounting on standard 5" and similar setups! Even with the small form factor, the Vista can transmit the full power of the original air unit and has a range up to 4Km. The Vista also has a built-in receiver, allowing direct connection with the DJI FPV Remote Controller without the need for an additional receiver.