Forever presenting you the Latest Wireless Bluetooth 4.0 Technology with A2DP stereo music and pure, clear sound, ideal for high quality music while running, jogging, cycling, skating, etc Good noise isolation to create the optimal environment for listening to your favorite tunes, built-in microphone with noise cancellation for clear calling and friends chatting Sweat-proof, light weight and ergonomic design to enhance your comfort; comes with interchangeable earbuds