This is a FPVLR Advanced Long Range V.2 2.4GHz Antenna for the DJI GL300 Series Remote Control Transmitter (Phantom 3 Pro / ADV and Inspire Only).
This includes antenna array with LHCP + RHCP helix 10.5dBi gain (60 degrees beamwidth), two 2.4GHz amplifiers, proprietary mmcx to rp-sma cables with long connector, and external Li-ion battery.
The antenna leads of this kit will install into the GL300 motherboard without soldering, and can be used through stock antenna holes. No trimming / modification necessary to the TX casing other than mounting the unit to the back of the transmitter with some hook and loop tape.
Manufacturer's website state compatibility for Phantom 3 Advanced, Phantom 3 Professional, and Inspire 1 only.
This is being sold AS-IS. This was pulled from a GL300C that was test linked to a Phantom 3 Professional.
This does not include a charger for its battery. The antennas are mounted onto a piece of plexi and one side of that plexi has broken. This can probably be easily repaired and re-enforced. This unit retails for $325.
Please note that the use of this device may very well allow for your craft to exceed distances beyond local law regulations.
Installation of this unit will also nullify any warranty implied by DJI.
For detailed information on installation, more specific operating parameters, and possible battery charger type, search for "FPVLR" in your preferred search engine.