Thousands of hours working with world-class acoustic labs and audio engineers went into developing the very best wireless headphones. MS08B was built with a 6 mm customized speaker driver, and utilizes the latest CSR chipset. These features deliver a design that immerses you in your music, the way it was meant to sound. When you take the earpiece out, you will find out that the product design is as simple as it can be, because you won't find any button there!