The device connects to the video card in two ways at the same time (VGA-cable and feature connector cable), after which it allows to display the picture on both the monitor and TV via s-video or composite. The board normally passes the VGA signal through itself, degrading it more noticeably than the Voodoo 1, but in general the quality is enough for real-time preview. But no signal comes to s-video and other outputs, it looks like it is necessary either to find software for this board, or to set the position of switches and jumpers correctly, which without documentation is a boring and ineffective task. Maybe you know something about this board and have documentation and/or drivers?