-The External Microphone Input allows user to attach an external microphone to the camera.
-The Spot Metering option helps to correct exposure when shooting from dark to bright locations.
-Can shoot at 120 FPS but only at a standard definition of 848x480.
-Time Lapse Feature.
-No LCD viewfinder included (Can be purchased separately or purchase Wi-Fi BacPac and link Smartphone application).
-The menu can be difficult to use and understand.
-The camera has limited mounting options without the housing.
-The External Microphone Input is blocked when in waterproof housing. (Skeleton housing exposes external microphone input but unit is no longer waterproof.)
For more info go here: gopro.com
To see the TEST VIDEO click HERE.