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.
Similar to the GoPro App, the LCD touch display allows you to control every settings on the camera and even view all photos and videos recorded by the camera easily. It also comes with a built-in speaker with volume control and a 3.5mm headphone jack.
When it comes to selfie shots, the LCD touch display is pretty much useless and the live viewfinder of the GoPro App will be a much better choice.
The GoPro LCD Touch BacPac comes with pretty good accessories:
- Standard BacPac Backdoor
- Skeleton BacPac Backdoor
- Touch BacPac Backdoor
- Mounting Hardware
- Protective Case
Just in case you are new to GoPro, the Standard/Skeleton/Touch BacPac Backdoor is for you to interchange it with the backdoor of the GoPro’s housing so that your housing will fit both the GoPro and the LCD touch display.
Standard BacPac Backdoor delivers waterproof protection to 131′ (40m) for your GoPro and BacPac accessory.
Skeleton BacPac Backdoor features open sides for access to the camera ports, enhanced cooling and optimal audio capture during low-speed activities.
Touch BacPac Backdoor enables you to use the touch-screen functionality of your LCD Touch BacPac, and delivers waterproof protection to 10′ (3m).
The LCD touch display weighs 34g by itself and GoPro HERO4 Black Edition weighs 86g and in total, that adds up to 120g.
If you are using the standard housing it weighs 150g with just the GoPro HERO4 Black Edition. Adding in the LCD touch display and replacing the backdoor with the Skeleton BacPac Backdoor increases the weight to 182g.