Direct: 8, Maximum: 128 (via Cascade), Port Selection: OSD, Hotkey, Pushbutton, RS-232 Commands, Firmware Upgrade: 1 x RJ11 Female (Black), Power: 1 x DC Jack, USB Hub: 2 x USB3.1 Gen1 Type A Female (Blue; 2 x front), Port Selection: 8 x Pushbutton, Reset: 1 x Semi-recessed Pushbutton, Firmware Upgrade Recovery: 1 x Slide Switch, On Line /Selected: 8 (Orange), Power: 1 (Green), USB Link: 8 (Green), Keyboard / Mouse: USB, Housing: Metal, Warranty: 01 Year The ATEN CS19208 8-Port USB 3.0 4K DisplayPort KVM Switch can effectively access and control up to 8 DisplayPort computers from a single USB keyboard,