You will egt better range than RC1780HP if you select RC1701HP. This runs on 169 MHz and will have typ 5 times the range of a 868 MHz solution if all other parameters are the same (Output power and data rate, channel bandwidth). UNB stand for Ultra narrow band and is supported by RC17xxHP family.
Last Update: August 8, 2017
December 20, 2016 1227 RC232 Q&A