We are a professional manufacturer of Antenna. Antenna Electrical specification :Frequency range VHF: 174MHz 240 MHzGain3.0minVSWR2.0:1 maxImpedance50Ω or75ΩPolarizationVerticalConnector(SMA ,IEC,MCX )Male or CustomizationCableRG-174 Coaxial CableL : 1.25 MMechanical specification :Color BlackDimensions3200*28mmweight50gMounting FunctionWall MountMagnet Mount