More Online review: http://www.inspirepilots.com/threads/parabolic-reflector-shape-test.4800/ Video that shows how to test the shape of my antenna boosters with a laser to make sure the accuracy of parabolic curve. No matter where the beam hit, it would reflect to the antenna: Design for your DJI Phantom 3 / Inspire 1 controller. Unlike other booster sold online, our accurate parabolic curved booster completely reflects the remote signal to the antenna (the focal point of the reflector) 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. Made of 3D printed PLA Includes: 1x Parabolic Antenna Range Booster fr DJI Phantom 3 Inspire 1 Controller (picture #5) NOTE: DJI Phantom 3 controller is not included (reference only). Our Parabolic Antenna Range Booster is directional, in order to have the best performance, you need to point the antenna to the drone while flying. Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.