DJI Phantom 4 - Part 31 Mobile Device Holder (P4/P4A/P4P)
Secure your mobile device in place on your remote controller as you fly. Compatible with the Phantom 4 remote controller. The maximum supported width of the moble device is 170mm.
In the box:
x 1 Mobile Device Holder
https://www.dji.com/phantom-4-pro-v2/downloads