Description:[Advanced Bluetooth Technology] Wireless Bluetooth 4.1, ensure transmitting strong signal in high quality & high speed and offering high-fidelity stereo music, filling your world with premium sound: from richest bass to a pure, balanced response for natural sound. [Unique Design] Wireless Stereo Design, Ultra Mini Size offering you Wonderful HiFi Sound Effect. Its ergonomic design guarantees 100% Stable and Comfortable when walking, exercising, running, climbing, driving, skating, cycling, fishing and other outdoor sports. [Noise Cancellation & High-sensitivity Mic] Adopt Built-in Noise Canceling Technology and high-sensitivity microphone to reduces ambient noises and grasp the detail of voice, enabling clearer sound from microphone. You can get high quality hands-free phone conversation even on the street or inside a shopping mall.