Thanks for choosing the professional MP-SUH4KVM-3.0 HDMI 2.0 4x1 Switcher with four MP-SUH4KVM-3.0GR table grommets. The switcher features four HDMI video inputs and one HDMI output. It supports HDMI video resolution up to 4Kx2K@60Hz 4:4:4 HDR 10 and Dolby Vision. The switcher provides one stereo audio output for audio de-embedding, and provides four type-B USB ports and three type-A USB ports for KVM management. The four HDMI computers can be controlled via one keyboard, one mouse, and one monitor. In addition, the switcher features four GR ports to connect MP-SUH4KVM-3.0GR table grommets for source selection and black screen setting. The switcher can also be controlled via RS232 and front panel buttons.