These are the best headsets. They are a little pricy, however the price is worth it. I don’t know why we didn’t get them sooner. Perfect for the sailboat. Communication during sail raising and anchoring never got better. You can use these when one is at the top of the mast and one is down on deck. No more worrying about not hearing each other when far away or in noisy situations. You can link up to four headsets. They can be hooked to your phone and you can listen to music via bluetooth. A bit of reading to understand how they worked and a little bit of figuring out connection- they were up in no time. I understand why they are called “marriage savers”  these are definitely one of our best purchase’s, just wish we would have purchased sooner!