I have been using this wireless headset for my iphone and for my PC. I almost use it all day long, and I am very please. The tricky problem is to pair it with the USB PC unit after using it with the phone. Most of the times it connects by itself after advertised ( meaning after 20-25 secs after restarting the unit with the bluetooth service of the phone set off). But sometimes it does not connect well and you have to pair it. The first time i had the problem I called customer service. They knew nothing, i was very upset. By accident I found the way myself. You just have to keep pressing the multiuse button of the headset for over 15 sec and then click the button of the USB unit connected to the PC. Blinking blue light in the USB set and three flashes of blue light in the headset. I have to do this one every two years, particularly when i don't use the unit for a long time and the battery gets completely dry.