Navico WM-4 SiriusXM Marine Satellite Weather Audio Antenna [000-14970-001]WM 4 SiriusXM Marine Satellite Weather & Audio Antenna Tracking of weather is easier than ever with the WM 4 Receiver for Simrad, Lowrance, and B & G multifunction displays. The WM 4 provides live, up to date weather information and forecasting to give you peace of mind, no matter when or how you are using your boat. The weather information is obtained from the weather industrys leading experts and is delivered via a digital receiver through SiriusXMs