The present disclosure generally relates to an electronic device accessory and a method of using such electrical device accessory to convert a built-in camera or webcam of the electronic device into an adjustable camera using the mirror reflection, allowing the built-in camera or webcam to operate, for example, as a document camera. The electronic device accessory comprises at least a foldable main body and a mirror adapted to attach to the main body. The electronic device accessory is configured to clip onto the electronic device. The electronic device includes a desktop computer, a laptop computer, a mobile phone, a tablet, an e-reader or any other electronic device that has a built-in camera. More particularly, the electronic device accessory is preferably a foldable laptop computer camera accessory.