PCTEL MBS800 base station adapter kit. The MBS800 adapter allows a mobile 800 MHZ antenna to be used as a base station. By providing radials, the antenna can be used in areas where a ground plane is not available. Will accept any antenna that utilizes 1-1/8 inch 18 thread mounts. Mounts on 1- 1.75 inch outside diameter masts. Converts any 806 - 940 MHz mobile antenna into a base station.