HOBBYSUNRISC Copper Parabolic Antenna Range Booster for DJI Phantom 4 Phantom 3 Professional Advanced Inspire 1 Controller Transmitter Signal Extend (2 pcs) To improves both remote control and Wifi video connection performance for DJI Phantom 3 Inspire 1. It improves both remote control and Wi-Fi video connection performance for DJI Phantom 3 / Inspire 1. In an open testing area, it boosts additional 50%-100% FPV range Compact design and good firmness Lightweight,durable,pratical and convenient to use