The "2" is for the pretty blue...the headset doesn't sit in correct proximity to the ear due to a poorly designed ear loop that is virtually impossible to adjust and stay where it has been positioned. The microphone becomes buried in the cheek thus closing the orifice. The only way it works is to remove it, turn it off, and use the telephone as instructed in the manual. Pretty poor stuff. Don't buy it, wait until someone designs a Bluetooth that really works.