Features: [Advanced Bluetooth Technology] Latest Wireless Bluetooth 4.1 Technology with A2DP/ AVRCP support, 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. [Multifunctional Design] 4 in 1 Multifunctional: Adopting Bluetooth 4.1 Wireless Technology(Easy to pair with almost any Bluetooth-enabled audio players devices), equipped with 3.5mm audio jack(provides a simple wired connection of a variety of music players, such as, MP3 / MP4, etc. without Bluetooth function devices), comes with built-in FM Radio Module (bring you much convenience to listen to news). [Ergonomic Design] Light and Portable, folding and adjustable headband length design. Its ear cushion design is based on the outline of human ear which is comfortable to wear and can greatly insulate the noise around you, so you can hear your music and call clearly. The Over-ear styling is stable, guarantying 100% Stable and Comfortable when walking, exercising, running, climbing, skating, cycling, fishing and other outdoor activities. [DSP Noise Cancellation High-sensitivity Mic] Adopt Built-in DSP 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. [Long Standby Time Fully Compatibility] Built-in rechargeable Lithium battery lasts up to 8 hours of Talking Time / 8 hours of Music Playing Time (Almost Daylong Time) and 120 hours of Standby Time per charge cycle. And universally compatible with most Bluetooth-enabled devices, including iOS / Android / Windows Smart phones Tablet PC and other Bluetooth devices.