The LL-304VC4B-4CD is a 4-channel video switcher with four video input ports and one audio input port. It is manufactured by Lucky Light and features 4-resolution processing, video loss detection, video motion detection, and edge blending functions. It also supports HDMI, VGA, and composite video sources. It is suitable for large-scale video application and comes with a versatile user-friendly make settings interface. The LL-304VC4B-4CD is an ideal choice for digital signage, conference room, shopping mall, club, museum and other places that need efficient video processing.