Professional free net radio offers you extraordinary stability for each application it has a plastic cover metal housing and fulfils both the ip 5455 standard as well as the us military standards 810 c d e and f the free net transmission standard is at present the only one in germanys permitted and free transmission 2 m band 149 mhz frequency offers you a larger range in free area as against pmr446 the smaller distribution of free net makes possible an almost unimpaired radio link