This is an addition remote unit for the HD-EX345-120 extender kit.N/AThe HDMI Extender allows you to transmit a HDMI signal over Ethernet using the HDBitT transmission protocol. You can transmit a HDMI signal all around your house or office using a single Cat5e/Cat6 cable.N/AThe Plug and Play design is very easy to use simply connect both units to the HDMI devices connect the I/R adapters and plug them into the extenders.N/AThe extender can transmit 1080p(60Hz) up to 120 Metres(using Cat6 cable).N/AMultiple receivers can can used with single sender making it possible to extend one source to multiple displays using our HD-EX345-120-RX with our HD-EX345-120.N/AThere are three ways which these can be used Point to Point which uses one sender and one receiver link by a single networking cable. Point to Point through a networking hub or switch. One to Many which uses one sender an unmanaged gigabit networking hub and multiple receivers.