This 6 inch magnetic mount cellphone antenna is made of stainless steel and is fully weather-proof. It’s designed to be mounted on the roof of a car but can be used anywhere. Great for Mobile amplifiers where you don't want permanent installations. The CM200-S is an Omni-directional antenna with SMA or FME connector. Omni-directional gather signal from all sides and does not need to be pointed toward the tower. For best results, the antenna should be mounted in an upright position. Mounting Details: The CM200-S Magnetic Mount Antenna uses a rare earth magnet mount. This antenna is portable and improves the signal on any vehicle with a steel exterior. It works well on automobiles, semi-trucks, and RV’s and can easily be moved from one vehicle to another