With OMTP and CTIA; Suitable for different earphone jack of cellphones; Supports music playing and speaking With OMTP and CTIA; Suitable for different earphone jack of cellphones; Supports music playing and speaking Solve the problem of incompatible cell phone headset CTIA and OMTP conversion Product description: Universal Headphone Adapter If you buy a new mobile phone headset plug in the phone just as no one accompaniment or vocal sound is Gone. It shows the headset with your phone is not compatible. Well this adapter can help you solve the problem! Tips: not compatible with a headset plugged in the phone is only background sound voice or no voice is small hold the headset button above if the sound back to normal it would be representative of the headset on your phone is not compatible with the above you can use this adapter is used. After the phone headset adapter through the conversion of normal use on a PC / MP3 3.5mm jack and other equipment. A very useful headphone adapter! The main principle: The current mainstream mobile phone headset plugs mostly plug 3.5mm 4 segment. Although the appearance of the brand cell phone headset plug specifications consistent but not well compatible with each other. The main reason for these problems is the appearance of the brand headset plugs although the same but the way the definition of internal wiring plugs vary.