A video amplifier can be a useful addition to a mobile entertainment system utilizing multiple video monitors. The SVA4 allows you to send a video signal to as many as four monitors without suffering the symptoms of a weakened or deteriorated signal including poor picture quality or even a blank screen. Additionally, since individual monitors have different signal strength requirements, the SVA4 also has a signal amplification adjustment for each line. This allows for fine tuning of each individual monitor, so that it runs at its optimum level of performance. For technical questions about this product please visit our website, soundstormlab.com, or call a technician at 888.38.STORM. Let us prove to you that when it comes to building an impressive and affordable home-quality theater in your vehicle, Sound Storm is your mobile entertainment solution…and everything else is just noise.