Atlona Technologies AT-HD800 Portable HDMI Signal Generator with 1080p and 3D Support Package Includes: AT-HD800 x 1 5V/2A Power Supply x 1 Rubber Case x 1 User's Manual x 1 The Atlona HD800 is a Portable HDMI signal generator capable of testing any video resolution or timing in any digital format The HD800 allows users to diagnose specific resolution, video timing, EDID, and color space issues in any DVI or HDMI video system.