WxWorx XM PANT6 Portable XM Radio Antenna The small, portable XM Antenna is required to receive an XM Satellite signal for Radio and/or Weather data Comes with a 23-foot cord for optimal flexibility in antenna placement Antenna is magnetized and adheres firmly to any metal surface; it sports tiny rubber feet to prevent surface scratching Separate subscriptions to XM Satellite Radio and XM WX weather data are required Measuring .5 inches high by 1.75 inches long by 1.37 inches wide, the antenna is small enough to place just about anywhere without being in your way