The CVG-VP23 is a extremely versatile, high resolution multi-format presentation switcher. What makes the CVG-VP23 so unique, is that it is actually three independent high resolution 4 x 1 switchers in one unit! There are three sets of four (4) video/stereo-audio inputs - one for VGA/SVGA/XGA (HD15 pin), one for S-Video (4 pin), and one for composite (BNC). The VGA/SVGA/XGA switcher has 315 Mhz bandwidth and front panel mounted controls for output level and equalization. The composite switcher has 470 Mhz bandwidth and the S-Video (Y) channel 260 Mhz bandwidth. Input switching can be controlled either by touch switches on the front panel or via RS-232 (Windows software included).The CVG-VP23 allows you to insert a microphone into the master audio channel input for talk over during a presentation. Inputs: 4HD15 jacks, 4BNC jacks, 4 S-video jacks, 12 pair RCA audio jacks. Outputs: 1HD15 jack, 1 BNC jack, 1 S-video jack, 4 pair RCA audio jacks.