27Align the battery with the locking slot of the body, and insert the battery by pushingforwards.※ Insert or remove the battery with the aircraft powered OFF. After flight, remove the battery.※ The battery contains hazardous chemicals. Prior to use, please carefully read the Battery Safety Guideand the warnings written on the battery.Remote controllerThe remote controller of GDU O2 product is equipped with the advanced automaticfrequency-switching wireless communication system. Your mobile phone can be easily insertedon the remote controller. The wireless HD video transmission system is integrated in the remotecontroller. Using the GDU Mini App, the user can watch HD real-time footage on their mobilephone. The parameters of the aircraft can be fully displayed on the screen.Prepare the Remote controllerPower on and offPress the remote controller until you heard the prompt tone to power on/off the aircraft.Power Check