1. 4 Port KVM Dual Monitor: allows 4 PCs sharing one set of keyboard & mouse, 2 monitors, audio, microphone and 1 pcs USB 3.0 peripheral device. With 10 pcs high shield Displayport 1.4 cables for input and output. (Tips: 1. this KVM switch required your computer with 4 video outputs. 2. This KVM switch is without EDID emulation. 3. Please use the Displayport 1.4 cables which come with the KVM switch to connect your computers and monitors to avoid monitors flickering.)