Amazon.com: Release and Drop Professional Device for DJI Phantom 4 (all models) – Drone Fishing, Bait Release, Load Delivery, Search and Rescue and Fun – U.S. Patent - by DRONE SKY HOOK :
Phantom 4 - DJI
DJI Phantom 4 Pro Review | PCMag
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DJI - Introducing the Phantom 4 - YouTube
DJI Phantom 4 Drone Series Infrared Conversion Service