[. . . ] Smartkey&feature Stereo Headphones Operating Instructions Manual de instrucciones Multi-function button Botón multifunción Microphone Micrófono 4-456-785-12(1) MDR-ZX300AP English Stereo headphones * The button function may vary depending on the smartphone. [. . . ] ** Availability of the “VoiceOver” feature depends on iPhone and its software version. Effective frequency range: 20 Hz – 20, 000 Hz * IEC = International Electrotechnical Commission Design and specifications are subject to change without notice. Precautions Compatible products Notes Use this unit with smartphones. 23 oz) without cord Microphone Design: In-line microphone Type: Electret condenser Open circuit voltage level: –40 dB (0 dB = 1 V/Pa) The validity of the CE marking is restricted to only those countries where it is legally enforced, mainly in the countries EEA (European Economic Area). You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment. Optional replacement earpads can be ordered from your nearest authorized Sony retailer or www. [. . . ] You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment. [. . . ]