Headphones features acoustic sealing isolation technology iPod accessory offers stable sound without burst and with noise reduction High performance accessory for your iPod, PSP, MP3 player or portable DVD player Japanese high gauss ultra high power neodymium magnet technology Two custom-designed pro-stereo speakers Around the neck street style earphone design (One side is designed to be longer then the other to go around the neck) Balanced treble, mid, and bass distribution with noise reduction Super small at just 9 mm diameter Supports pro stereo and 3D multi-channel surround sounds Special closed-type design Super light, in-the-ear design with multiple sizes of soft silicon ear pads Premium gold-plated 3.5 mm connector iPod compatible