Once we started using the product at home it worked great. Then we went on vacation with him. We took her on a cruise. While on the ship we heard a lot of static and other chatter (yes we changed channels). The worst part was that they were with us and other people in our group could hear us talking even if nobody pushed the button. A total invasion of our privacy. We will come back in any case. Also, they looked used. All parts were assembled when I opened the box. One even had a scratch.