1).Bluetooth 4.1 + EDR & CSR8615 Chipset: adopt Bluetooth 4.0 with CSR system controller, low power consumption, excellent compatibility, compatibility for almost all mobile phones, tablet PCs, laptops, any devices with Bluetooth function or have 3.5 audio jack mm 2). HiFi powerful bass stereo sound effect: 40 mm titanium speaker with diaphragm drivers, tuned by the professtional team, deep bass stereo sound, enjoy high quality wireless music .. 3). Support TF card Play & FM radio: headphones have a TF card slot, you can insert a Micro-SD card with songs to play music; It has FM radio function, allows you to listen to the radio anywhere, anytime (Note: FM radio may not work in some foreign countries). 4). Smart Speakerphone: Built-in hidden high-definition sensitive microphone, the headphones themselves have an incoming phone call answer button to pick up the phone call, Wireless Speakerphone. 5). CVC6.0 noise reduction: Acoustic echo cancellation and noise reduction effectively reduce ambient noise during a conversation, make the far listener can not hear what you said to become history, just like talking face to face. 6). Line-out music playback mode: has a standard 3.5 mm playback mode, you can use a 3.5 mm audio cable that connects to headphones to listen to music, even your phone does not have Bluetooth or headphones do not work. 7). Comfortable wearing experience: folding design, headphones are super light, based on ergonomic design, headphones are made of soft breathable protein skin, providing you comfortable wearing experience.