Triplett HDCM3 HDMI and Composite Video Test Monitor. Ultra-Compact Rugged HD Monitor. This is a multi-purpose ruggedized HD LED monitor. It can be used for temporary or permanent connection to any NVR, DVR, Cable/Satelllite box, computer, or other video source that has an HDMI, AV, VGA, or BNC connection. Security Cameras during setup, testing, and monitoring. DVRs, Cable & Satellite TV boxes, & DVD Players. Computers and Laptops as a second monitor. DSLR Cameras as a second screen while broadcasting live events. Raspberry PI Projects and much more! High definition 1080P LED screen. Connections on top for easy access. Built-in rechargeable battery plus A/C adapter provided. Ruggedized for field use. The HDCM3 will not work directly connected to HD Analog Cameras or anything that uses proprietary encoding.