Mpow FreeGo Wireless Bluetooth 4.0 Headset Headphones with Clear Voice Capture Technology and Echo Cancellation for iPhone 6s / 6 Plus / 5, Galaxy Note 4 S6 and other Cellphones Upgraded Chips : Base on customer feedbacks and to maintain a stable voice signal, we upgrade the chips from CSR8610 to CSR8615, and now it can also support mute function. CVC 6.0 Technology : CSR-owned echo cancellation and noise suppression DSP software technology for enhancing the audio quality of wireless products. Stylish Crescent Outlook : With smooth piano lacquer and delicate rubber coating, you will get an awesome fashion experience. Comfortable Ear Cushions : Mpow FreeGo provides three Interchangeable soft ear cushions. Just choose the suitable one for your ear and enjoy all-day comfort. 180 Degree flip-boom arm for left or right ear - easy to wear, easy to use. Connect Two Devices at The Same Time : Pair it with two Bluetooth-enabled devices at the same time and don't miss your calls when you have two cell phones!