4 in 1 FUNCTION‎:‎ This iPhone splitter has 2 Lightning Port‎,‎ one port is for Charging‎,‎ another is an audio port‎.‎ the charging port is just for charging‎,‎ and the audio port can be used for listening to music and calling‎,‎ also it is wire control‎,‎ you can control the music and call through the earphones‎.‎ COMPATIBLE DEVICES‎:‎ Support iPhone Xs Max‎,‎ Xs‎,‎ X‎,‎ iPhone 8 / 8 Plus‎,‎ iPhone 7 / 7 Plus‎,‎ the dual lightning adapter is perfectly compatible with iOS 10 and above‎.‎SMART CHIPS & HD SOUND QUALITY‎:‎ Supports up to 48 KHz and 24‎-bit audio output‎,‎ keep apple lightning earpods sound quality with no compromise‎.‎ Also supports 3.5mm AUX in the car‎.‎ MINI & PORTABLE‎:‎ The dual lightning adapter is very small‎,‎ light and compact‎.‎ You can put it in your bag‎,‎ wallet‎,‎ briefcase or pocket so you can carry it around‎.‎ Listen and charge your phone at the same time will not be a problem anymore‎!‎