1)Qualified Cat5e and above cable is needed to pair the RX&RX. Pure copper conductor is a basic for a qualified ethernet cable. 2)Pls use HDMI ATC certified cable to pair the video source and Display. 3)This KVM extender has very limited compatibility with wireless&mechanic keyboards and mouses. For better compatibility, 104-key standard keyboard and wired mouse are recommended. 4)This HDMI KVM extender supports POC function and only one 12 power supply is included. 5)The KVM Extender was 100% Tested with Cat6e cable of 26AWG at 50M. And the transmission distance is subject to the quality of the cable connected. 6)We will send the KVM Extender with various kinds of brands and silk printing randomly without prior notice. Features: Extend USB&HDMI signal up to 50M Support resolution up to 1080p at 60Hz Support HDMI loop out on TX for monitoring Supports POC at both TX and RX. Supports point to point connection 12V External power supply What's in the package: HDMI KVM Extender TX HDMI KVM Extender RX USB Data cable X1 12V Power supplyX1