If you need a mini monitor then Doublesight can provide the answer. They’ve just launched three models, from the smallest a 7″ 800 x 480 DS-70U to a larger 9″ monitor with a resolution upto 1024 x 600. The 9″ monitor is also available equipped with a web camera which plugs into the top of the Monitor.

The DoubleSight DS-90UC utilizes USB for both power and video with a power consumtion of 3.3 ~ 4.9W.

Multiple Monitors are a productivity solution and adding a second or third monitor to your computer has never been easier.  Simply connect our Smart USB Monitor via a USB Port and run the installation software.  That is it.  The DoubleSight DS-90UC utilizes USB for both power and video.  No additional video port, video cable or power adapter required.  The DS-90UC ships with an adjustable stand for a custom view, including both Landscape and Portrait viewing modes.

MAC users: Only Intel based Desktops and Laptops are supported

Via USB Everything Via Doublesight