I spoke with Nortek today and they are indicating that there is a release coming soon to add 900Mhz support to the GC3 (allowing you to pair the GC3 with the TS1 touchscreen). He hung up before I could determine whether or not the GC3 has built in 900Mhz support or if you will need to add a XCVR2 module. Does anyone know if the onboard radio supports 900Mhz as well as 345Mhz?