Sima SVS-4 4 Input A/V Switcher with Remote (Discontinued by Manufacturer) Automatic input selection detects component in use and switches to its input automatically, requiring no button pushing Volume stabilization adjusts the sound level automatically Composite to S-video conversion Compression settings minimize the difference in volume levels between regular programming, loud commercials, and special effects Expand setting heightens the potency of your video programs by increasing their audio dynamic range