inputs.text: really work well - intercom works great intercom units also work great long range dakota alert bought driveway impressed also purchased extra alert transmitter work conjunction three intercom units guess shorter range alert transmitters look dont operate murs channels alert transmitter transmits uhf intercom units existing long range alert transmitter work vhf channels even confusing amazon adds refer sensors wmt3000 transmitter units tells add number transmitters receivers system true description says \\murs\\ unfortunate operating channels meaningful specifications seem omitted types products amazon pages otherwise great units careful building system