No one could understand what I was saying! This was a used headset, so perhaps something was wrong with just this unit. The reviews on the H700 were okay, but THIS particular one was useless. It also looked somewhat beat up when I received it. Right from the start people were saying that we had a bad connection. Most people said that they just couldn't understand me. With some, I would end the call then call again with my friends Bluetooth and they would say "That's MUCH better!". I explained this to the  BooksExpress610 rep and was told "This unit was tested by our trained staff prior to being listed on Amazon. The report we have that it was in perfect working order. If you would like go ahead and return it to us however a restocking fee will be charged by BooksExpress610."  I then asked how much and was told "We will not know how much the restocking fee is going to be until we see the product and the condition of it. It also depends on if you return the provided accessories with it (USB cable) restocking fee is between 5%-15%."  So, I shipped it back in the exact condition it was shipped to me in, with the USB cable, and, of course, they charged me the full 15%! I will avoid Books Express610 for anything in the future! They were not in the least bit concerned with customer satisfaction. As I told them, I REALLY wanted to love this headset! Now I don't know what to get for a Bluetooth headset as I had really high hopes for the H700.