4K60 HDMI Dual-Head KVM Switch - 4 Port 1 x 12VDC, 3Amp Wallmount Supply (Includes US, EU, UK, AU Plugs) 1 x Quick Install Guide MTBF: 58,618 hrs Altitude: 7,000 feet Environmental: Humidity: 5 to 90%, noncondensing Operating Systems Supported: Windows, Mac, Linux Power: External 100-240 VAC/12 VDC, 3 A Storage Temperature: -30? to 80?F (-22?C to 176?C) (2) HDMI (Female) (2) USB Type-A (Female) for HID (2) USB Type-A (Female) for USB 2.0 (8) HDMI (Female) (4) USB Type-B (Female) (4) 3.5mm Analog Audio (1) 2.1mm Barrel (1) RS232 DB9 Female for Remote Control