
1) Element of much film noir 2) Narration 3) Narration work 4) Travelogue technique 5) Unseen narrator 
Found on 
https://www.crosswordclues.com/clue/voiceover

 VoiceOver is a screen reader built into Apple Inc.`s OS X, iOS and iPod operating systems. By using VoiceOver, the user can access their Macintosh or iOS device based on spoken descriptions and, in the case of the Mac, the keyboard. The feature is designed to increase accessibility for blind and low-vision users, as well as for users with dyslexi....
Found on 
http://en.wikipedia.org/wiki/VoiceOver
  No exact match found.