Parabolic Airdrop Servo Switch Device Kit Remote Control Control For Dji Phantom 4 / 4pro Advanced Drone Accessories - Landing Gear - AliExpress
DJI Support - FAQ #5 What is the 'P A F' switch about? A. Positioned on the controller itself, this is the Flight Mode Switch that lets you toggle different flight modes;
Set Up for Flying - Start Here! – DroneDeploy
DJI Phantom 4 RTK SDK Edition | DJI Oslo - DJI Authorized Retail Store Oslo