I bought two 530Hcx's and Garmin Mapsource City Navigator and US Topo plus two microSD cards. I tried to load the maps on the devices but was suddenly shocked to learn that you can only load maps onto one device. Garmin support told me that I needed to purchase two more map licenses.In addition, the range of the radios at a supposed full 5 watts is just over 1 mile, with clear line of site.I returned the whole set and will never purchase anything from them again.Forget Garmin.