This app serves as a virtual controller for your Protocol Helicopter. Included adapter plugs into the audio jack on your device. App: 1.Top of the screen: Frequency selection. Select A, B, or C to select your helicopter’s frequency. 2.Center screen: On/Off button 3.Left side of the screen: Throttle used to control the height of the helicopter. 4.Right side of the screen: Direction control stick used to move the helicopter forward, backward, left, and right. 5.Bottom of the screen: Trimmer control. Use the < and > buttons to adjust the trim on the helicopter. 6.Upper right corner: Optional motion-sensitive control button. 7.Center: Rotate screen button if you prefer to flip the screen 180°. 8.Bottom right corner: Info Button. Features instructions for installing the adapter, a diagram of the controller screen, and a guide on how to use the application.