The AeroAntenna Mobile Permanent Mount Antenna is a versatile, larger antenna that delivers improved reception over our portable auxiliary antenna. This antenna requires a 1.6 cm (0.625 in.) diameter hole in the vehicle rooftop to secure the bolt antenna and 40 inches of square metallic surface. This Iridium-frequency antenna (AT1621-5) is designed for land/mobile applications and will work with both voice and data communications systems. 197 inches of antenna cable is included and attached to the antenna. The antenna includes a bulkhead connector to allow it to be installed on the roof of a vehicle with only one hole.