Audio Adapters & Mods. Car & Home Kits. The AFXSM-5 kit includes our top-of-the-line PRO500 Satellite Radio antenna. Unlike any other Satellite Radio antenna, the PRO500 filters out all other interference signals such as WIFI, CB radios, or Cell Phones that cause you to receive a weak signal using any other Satellite Radio antenna. This truly is the perfect choice to add XM or Sirius to your home. No matter what you use to provide music to your customers or home, this antenna kit is the perfect option! Antenna length: 48 inches. FM Band Frequency: 88MHz -108 MHz. Ground plane required: None. FM load impedance: 75 ohms. Antenna Beam width: Omni-directional. U Bolts Inside Dimensions: 2 inches. Satellite Radio Superstore reserves the right to refuse any order for any reason. It all started in early 2003 with a couple products, a single shelf, and a living room full of boxes. Since then we have become the largest SiriusXM Radio independent retailer in the US. Our daily focus is to offer each customer the very best in customer service and product information. Whether you are looking for a small part, an accessory, or the engineering plans for a large commercial installation, we have you covered. We are grateful for your business and look forward to serving you in the future. The Satellite Radio Superstore Team!