Come and see our amazing products. Up to 48 kHz and 24-bit audio output, keep your original headphone sound quality. It also supports 3.5mm AUX in the car. Plug and Play, Tiny Size: No setup, no installation, just plug and play, small size, easy to put in pocket or wallet. Upgraded Compatibility: Perfectly compatible with iOS 11 or later, Designed for Apple Phone, Dual splitter allows to use headphone and charge at the same time, moreover, it also supports calling function. Supports microphone and all remote control on Apple Headphones. Please connect headphones and USB cable to the adapter first, then connect the adapter to your Phone. otherwise, your phone may display a message: "this device is not supported" Blue-Two headphone hole output holes, you can plug in two headphones. Pls confirm further with us if any query about packing info, inventory status and time schedule.