BTR TV ART TRANSMITTER ANTENNA THROTTLE LEVER CONTROL STICK SWITCH TRIM LEVERS SERVO REVERSING 3 MIXING SWITCH — no Qa ase the battery holder in the transmitter case so ” that the two contacts on the battery holder align with Ahe contacts in the transmitter case, Reinstall the battery hatch on te transmitter cask and tighten the screw. Ch 4. Switch on the transmitter and check the LED on the front of the transmitter, i the green light is on, itn safe to fly.