Transmit Frequency 3.5-57 M Hz Receive frequency 2.0-90 M Hz VSWR 1.51 Typical Power 250 Watts SSB Impedance 50 Ohms Length 7.13m Socket SO239 Mast Size 30-52mm This amazing antenna will transmit from 80-6m with no gaps with a VSWR below 1.51 Heavy duty construction with stainless steel fixings ensure long life. Perfect for every application with no radials required it provides the amateur with limited space an all in one solution to getting on HF with results