If you are using the GoPro HERO4 Black Edition, it doesn’t come with a built-in touch display. You will need to get the extra LCD Touch BacPac which cost S$120. I got it together with the GoPro Tripod Mounts at Click! by Max Photo which is located at Funan DigitalLife Mall #04-15.
The LCD touch display is good for framing your shots without the need for using the GoPro App (iOS | Android | Windows Phone) as a live viewfinder because the process can be quite cumbersome and the live viewfinder it lags by about 3 seconds.