NX3 3D Flight Controller Gyroscope Balance For Fixed-wing Aircraft RC Airplane

itcan be used for fixed wing planes only and there are four options: T-Tail (one aileron channel, vertical stabiliser, elevator), T-Tail Ail2 (separate aileron channels, vertical stabiliser, elevator), Delta Wing (aileron and elevator mix) and V-Tail (elevator and rudder mix).

no,you don't need that in your transmitter,that function is on the gyroscope, it's the one on the top activate it by pushing it with the small screwdriver to the right

fishmanpuffer, the modes under the listed features are: 2. Three Flight Modes supported: 　a. Rate Mode, Rate Mode for offset correction. (This is the mode used to correct for wind and is called the NORMAL mode in some other stabs.) 　b. Hold Mode, HOLD mode for attitude hold. (This mode is used to HOLD whatever attitude your plane is in when you let go of the sticks. It may be level or NOT.) 　c. Gyro Off Mode, transmitter control the plane directly. (This is the MANUAL mode where there is no stabilization.) I recommend you always have the MANUAL mode easily selectable and start with it when you takeoff. Once you are high enough, select one of the stabilized modes. All should be well if your setup was correct but be ready to select MANUAL mode if they are not.