$50 FlySky FS-i6 2.3km range test - no mods! - YouTube
PPM signal support for FS-i6 radio | QuadMeUp
FlySky FS-i6 2.4 GHz 6 Channel Transmitter and Receiver System for sale online | eBay
Amazon.com: Flysky FS-i6 6CH 2.4GHz Radio System RC Transmitter Controller with FS-iA6 Receiver for RC Helicopter Plane Quadcopter Glide(Model_2) : Toys & Games