? No tuning ;? 140MHz bandwidth;? 2.4dBd gain with ground plane ;? Unity gain without ground plane;? 11 tall ;? 1/2 wave ;? Works on any surface ;? 160W;? Solid-brass NMO base wtih black kote finish;? Gold plunger-type contact pin;? Stainless steel whip & spring with black chrome finish;? NMO mounting ;? Mount sold separately ;? SWR