The 02623K is a 4.5dB gain, roof mount Fibreglass Antenna Kit covering the 470-490 section of the UHF commercial Mobile Radio Bands. When installed on a Ground Plane, the 02623K antenna kit offers a genuine 4.5dB* of gain on the horizon across the whole designated band of operation. It is designed for optimum performance on the mobile base (included in the kit) and covers the entire respective designated bands of operation under 1.5:1 VSWR.