The VM8814 is a 4K HDMI output board that works with an ATEN Modular Matrix Switch to offer an easy way to route 4 HDMI sources to 4 displays. In addition to the HDMI interface that carries digital A/V signals, the VM8814 is equipped with 4 stereo audio output ports that allow HDMI audio extraction. Compatible with the VM1600 / VM3200; mix and match with modular I/O boards of any type for optimum flexibility. 4K Scaler –features a video scaling function to convert input resolutions to the optimum display resolutions. Seamless Switch™ –features close-to-zero second switching that provides continuous video streams, real-time switching, and stable signal transmissions. FrameSync –prevents image tearing by synchronizing the scaler output frame rate to the input signal frame rate.