Detrum Z3 Lite EP RC Airplanes Flight Controller Return To Home RTH w/ GPS & 3-in-1 Program Card ComboDetrum Z3 Lite RC Airplanes Flight Controller w GPS & 3 in 1 Program Card Combo DTM 1009 (EP version) Detrum Z3 is a flight controller for fixed wing airplanes, including normal, delta wing, and V tail airplanes. It connects to the receiver on the airplane to provide flight control. Z3 supports five flying modes: Return Home Mode: once actuated, the airplane flies back to the location where it takes off regardless of the airplane flight attitude;