It works Okay with one device, but switching between the two, like when you listen for something on a computer and then a phone call comes in, doesnt work for me. Good product but too narrow for me. BUT it feels like there is a heating element inside both of the headphones after they?ve been on your head for 15 minutes the speakers must have an amplifier inside each muff that?s producing enough heat that it becomes unbearable to wear continuously for over 30-45 minutes. The charging box is super easy to use. it does run smaller than sized! *spongebob meme five days later*The headphones have started stuttering again. Wish I could return for a smaller pair. Wait till you hear theme say: "right channel, left channel, connected", youll get a good laugh. Happy with purchase I am sooooo glad I bought these!