If you are a designer constantly looking for device images when doing mock ups or presentations, this extensive repository from Facebook Design Resources could probably cover your needs - including Computers, Phones, Displays and even Smart Watches. You can download the whole collection or just individual images based on whatever you are currently working on.
Visit Devices - Images and Sketch files of popular devices ( Facebook Design Resources ).
Visit Devices - Images and Sketch files of popular devices ( Facebook Design Resources ).