This HDMI over IP Extender use the advanced M-JPEG as the compression type, which makes it occupy lower bandwidth and transmit over the LAN more smoothly. It supports 120m over single cat5e/6 cable at point to point, point to many, as well as many to many over Ethernet switch. The over IP solution is widely used in various locations, like meeting room, class room, metro, airport, home, mall advertisement...etc.Note: The switcher needs to be purchased separately and is not included in this product. HDMI extender can be used alone, supporting one-to-one (TX to RX) mode,Use it together with the switcher to maximize the function of this extender product. Backage contents:1x Main unit Transmitter,1x Main unit Receiver,2x IR-Receiver cable,2x IR-Blaster cable,1x User Manual, 2x Phoenix plugs for RS232 cable termination,2x 5V Power adapter. HDCP Compliant,Support PC web control,Build in EDID,Carry power to Tx and Rx units with a Power Over Ethernet enabled Smart Managed Switch (*Optional POE version only). RS232 passes from TX to RX or from RX to TX, connect to your RS232 devices, such as PC,IP Camera, Creston control panel, Smart Matrix, printer and Scanner and so on. It works when TX, RX and your RS232 devices baud rate is the same,baud rate Up to 115200. Support one to one, one to many, many to one or many to many modes with large cascade. Single Cat5e/6 cable:Support LPCM audio format,Bi-direction Wide-bandIR pass through to control the source or sink device. (38khz to 56khz). Using M-JPEG compression encoding, support resolution up to 1080p@60hz, Comply with TCP/IP protocol, Transmit up to 120meters@1080p/60Hz over.