Sony MH-EX300AP In-ear Stereo Headset Headphone Earphone for Xperia Z / ZL / V / LT36i / LT35i / LT25i Magnet: Neodymium (440kJ/m3) for outstanding bass performance in a small driver Speaker Type: Closed, Dynamic Compatible with Sony Xperia Z, Xperia ZL and Xperia V phone models. OEM Part Numbers: MH-EX300AP / MHEX300AP / 1268-228.