 CVC6.0 Noise Reduction : Noise Cancellation 6.0 reduces outside noises and enables clearer sound from microphone. Perfect for working out along with excellent noise isolation.<br /> Bluetooth 4.1 Technology: Support more stable Bluetooth signal when you work out， and the working distance is up to 10m.<br /> Extra-long Working Time : The upgraded battery allows you enjoy over 8 hours talking/playing time and 24 hours standby time.<br /> Move in comfort : Ear hook design helps to lock in your ear snugly， well fits for sports.<br /> Hands free Calling : With the build-in microphone， you can answer mobile phone calls by pressing the button on the ear piece. <br /><br />