1). Bluetooth 4.0 CSR Chipset, Lower Power Consumption, Superior Compatibility, Compatible For Almost All The Mobile Phone, Tablet PC, Notebook, Any Devices With Bluetooth Function Or Has A 3.5mm Audio Jack. 2). HiFi Powerful Bass Stereo Sound Effect: 40mm Titanium Diaphragm speaker drivers, Tuned By Professtional Team, Deep Bass Stereo Sound, enjoy the Wireless high quality music.. 3). Support TF Card Play & FM Radio: The Headphone Has A TF Card Slot, You Can Insert A Micro-SD Card With Songs To Play Music; Has FM Radio Function. 4). Smart Handsfree Talking: Built-in High Definition Sensitive Microphone, The Headphone Itself Has A Answer Incoming Phone Calls' Button To Pick Up Phone Call, Wireless Handsfree Talking. 5). Acoustic echo cancellation and noise reduction effectively reduce ambient noise while talking, make far-end listener cannot hear what you said become history, just like talking face to face. 6). Line-in Music Playback Mode: Has A Standard 3.5mm Audio Jack Support Line-in Play Mode, You Can Use 3.5mm Audio Cable Connect To Headphone To Listen To Music Even Your Phone Don't Have Bluetooth Function Or The Headphone Is Out Of Power. 7). Comfortable Wearing Experience: Foldable Design, The Headphone Is Super Lightweight, Based On Ergonomic Design, Earmuffs Are Made Of Soft Breathable Protein Leather, Providing You Comfortable Wearing-on Experience.