The 02633QC antenna is a 3dBi Gain, Ground Independent Mobile Antenna covering the lower end of the UHF band. The 02633C antenna offers a genuine 4.0dB of gain (over quarter wave), on the horizon across the whole designated band of operation. The antenna is designed for optimum performance with the 10109 - UHF M/SO239 Base & lead. Together, with the lead, 02633QC covers the entire designated band of operation under 1.5:1 VSWR.