Note:The higher in frequency and the longer of the length, then the greater of the attenuation. Please pick the length according to your usage.Description:Allows Base & Mobile Antennas to Connect to Handheld Antenna Jack. Cable length is 20-Feet and impedance is 50 ohm. Specification: Type: SMA Female to UHF PL-259 Male Impedance: 50 ohm Cable length: 20 ft Nickel plated connector body Gold plated brass contacts Package Includes:1 x SMA Female to UHF PL-259 Male RG58 Coax Cable