Multifunctional: Equipped with features of BT connection, TF card music playing, AUX-IN wired music playing, FM radio, and hands-free call with Microphone.BT Connection: With BT4.2 function, easy to pair with almost all the BT-enabled audio devices, freely to enjoy wireless music and hands-free calls.AUX-IN Function: Connect to the audio devices (such as MP3/MP4, Laptop, etc) without BT function via the 3.5mm cable (NOT included).Ergonomic Design: Adjustable headband length, foldable soft leather ear cushion, comfortable to wear, and easy for storage.High-sensitive Mic: HD microphone reduces ambient noises and grasps the detail of voice. You can get high-quality hands-free phone conversation.