This is the new DJI Air Unit manufactured by Caddx FPV.  Its the same as the old one, but has a new camera that is slightly smaller at 19x19mm

FPV through the DJI Digital HD Air Unit is the way FPV is meant to be. This 5.8Ghz DJI air unit (FPV camera + VTX) provides amazing visual clarity that is able to be transmitted to your DJI Goggles through its built-in receiver module. The Caddx DJI FPV Air Unit provides ultra-low latency HD digital image transmission, built-in 1080p/60fps DVR recording, and eight frequency channels to allow up to eight pilots to fly simultaneously.

Digital HD systems have traditionally been rather bulky and unwieldy to mount on a mini quad. Not anymore. With this air unit, you can comfortably fit the module in your mini quad stack (probably not slammed frames). The ‘mini’ camera fits easily into your existing builds, no weird mounting adapters.

• Caddx Air Unit Manual

Note: The air unit module does get very hot in use. Do not power on for an extended period of time without proper cooling (AKA flying).

Note: This air unit requires the DJI Digital HD FPV Goggles in order to work. However, using the DJI FPV Remote Controller is optional. The DJI FPV Remote Controller is useful if you want to use their built-in Tx system.

Compatibility

• DJI FPV Goggles V1 or V2
• DJI FPV Remote Controller V1

Tips

• The air unit may become hot during or after operation.
• DO NOT touch the air unit before it cools down.
• DO NOT use the air unit for an extended period when there is no external cooling equipment. Otherwise, the air unit may overheat and enter overheat protection mode.
• Keep the antennas of the air unit at least 40 mm apart.
• Keep the air unit away from metal objects or carbon fiber frames. Make sure to choose a position where the transmission will not be blocked during flight.

Includes

• DJI FPV Air Unit (with camera and four M2 screws) × 1
• Three-in-one cable × 1
• Antenna (MMCX elbow) × 2