Maximum: 256 (via Cascade), Port Selection: OSD, Hotkey, Pushbutton, RS-232Commands, 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: 16 x Pushbutton, Reset: 1 x Semi-recessed Pushbutton, Firmware Upgrade Recovery: 1 x Slide Switch, On Line /Selected: 16 (Orange), Power: 1 (Green), USB Link: 16 (Green), Keyboard / Mouse: USB, Power Consumption: DC12V:26.66W:175BTU, Housing: Metal, Warranty: 02 Years The ATEN CS19216 16-Port USB 3.0 4K DisplayPort KVM Switch can effectively access and control up to 16 DisplayPort compute