Review on Plantronics MX200 FlexGrip Universal Earbud Headset - 2.5mm & 3.5mm: The Ultimate Audio Solution by Tonya Greene

I have just received my shipment of Plantronics MX200 FlexGrip Universal In-Ear Headphones - 2.5mm & 3.5mm - Retail Box. This listing leads you to believe that you can use this kit with any size phone jack out of the box. However, the MX200 in the box that I received can only be used with a mobile phone that has a 2.5mm jack. The MX200 is, in my opinion, the best wired cell phone headset on the market for the money. However, I now have to order a separate adapter for the headset to work with my 3.5mm phone. I noticed that the online price is a few dollars less than the retail price of $19.99 on the box, which may be due to the missing adapter.