Wilson Mini-Magnetic Mount Cellular Antenna is a 4 inch dual band magnetic mount cell phone antenna. It is probably the most basic antenna that Wilson makes, but it is reliable, easy to install and dual band. It is easily portable and quickly installed so it can be transported as part of a portable cell phone amplifier system. It can be placed on the roof of your vehicle as part a cellular amplification system. The rare earth magnet will ensure that this is simple and secure. It is necessary to install the antenna on 4 feet diameter metal ground plane but this can be the roof of your vehicle. The antenna is dual band and is thus suitable for cell phone amplifiers which operate on 800 MHz, 1900 MHz and iDEN frequencies.