The 12" Magnet Mount Vehicle Exterior Antenna from Wilson Amplifiers is a multi-band antenna that's designed to work with any compatible and separately available Wilson amplifier to boost your vehicle's cellular signal by up to 6.12 dB. This is an omni-directional antenna, which means it can receive cell signals from any direction. It's made of stainless steel and is designed to be weatherproof, making it a suitable outside antenna for any vehicle. The Magnet Mount Antenna requires a metal ground plate that has a diameter of at least 3.5" to install. It's equipped with a SMA-male connector and plugs directly into your Wilson amplifier via the included coax cable.