By ordering this combination pack you will receive a standard Custom Earpiece, BoomBar, and a Plantronics MS50/T30 headset. This is everything you need to have the absolute best way to use these great Plantronics sets. First, you will receive your Plantronics headset, and you will receive an impression kit with easy-to-follow directions. Next, after you drop the completed impression in the mail (using the box and mailing envelope we provide), we will be sending you the custom earpiece and BoomBar. It's easy, and you will love it!