DJI Phantom firmware (3.12 or higher) has a new take of feature.
This new take of feature is optimized for transmitters with a spring loaded throttle control stick (throttle lever stick jumps to the center when released).
The current DJI Phantom transmitter is not equipped with this feature so with this throttle lever upgrade you can add this feature to your existing DJI Phantom transmitter.
Why upgrade ?
It’s easier to turn your phantom (yaw) without accidentally throttle up or down
Just release the throttle stick to level out your phantom
Takeoff is much easier (you just give a little bit of throttle)
It corresponds to the new takeoff feature of the new Naza-M firmware (3.12)