1. HDMI Monitor Switch for 4 Computers: 4 PCs in, 2 monitors output. With audio & microphone output, digital display, 1 USB 3.0 Hub, and all input cables. (Tips: If you want to use dual monitor, that computer/laptop should with 2 video outputs. If one of your devices only with 1 video output, that only 1 monitor has a display. )
2. 4 Computers 2 Monitors Switch KVM: Supports emulation EDID(defaults turn on), windows size and location won't change during switching between computers.