The Wilson 311104 dual band NMO Mount Antenna is a permanent mount antenna for use in vehicle applications. Permanent mounting requires a 3/8” – ¾” penetration in the roof or trunk of vehicle. This antenna is designed for use with mobile amplifiers, however, may be directly connected to specific devices. This high powered antenna is Omni-directional and can receive signal from all directions. Dual Band 800/1900MHz; Compatible with all major US Cellular Providers enhances both voice and data transfer services. Mount Sold Separately.