MPOW FreeGo Wireless Bluetooth 4.0 Headset Headphone with Clear Voice Capture Technology and Echo Cancellation In order to keep the Free Go a stable signal, We upgrade the chips from CSR8610 to CSR8615, and the unobstructed effective range is up to 35 feet. Now the Mpow Free Go can also supports mute function. The new version Mpow Free Go also contains a newer Clear Voice Capture (CVC 6.0) CSR's own echo cancellation and noise suppression DSP software technology for enhancing the audio quality of wireless products. Unique and Stylish Appearance: Unique design is inspired by crescent. With smooth piano lacquer and delicate rubber coating, you will get an awesome fashion experience. Comfortable Ear Cushions and suitable for Both Ears: 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!