The st124utpea is the 4 port extender transmitter unit utilized by startechcom stutpea vga and audio over cat 5 extension series this convenient video distribution system simplifies implementing digital signage solutions by allowing a single vga source and corresponding audio to be broadcast to multiple displays at up to 300m 950ft awaycomprised of this 4 port vga audio extender unit or an 8 port vga audio extender unit st128utpea and one stutpealr receiver unit or stutprxwla wall pla