The Fusion® Handheld Microphone is designed for compatible Fusion marine stereos with telemute feature, enabling you to make announcements over your onboard audio entertainment system. Use the Handheld Microphone to communicate with people in and around your boat - the perfect device for communicating when wakeboarding, water-skiing or fishing, for social gatherings or boat raft-ups, on tourist boats and warning others of water-hazard situations.