features Advanced BT 4.1 technology, 3.5mm Audio Port, Built-in high-grade Microphone Speaker, TF Card MP3 Player, FM Radio, hands-free function. The BT Headphone will offer you wonderful music, you can greatly enjoy your favorite Musician, a super companion for you during daily life and travel. Features: [Advanced BT Technology] Latest Wireless BT 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 BT 4.1 Wireless Technology(Easy to pair with almost any BT-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 BT 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. [CVC6.0 Noise Cancellation High-sensitivity Mic] Adopt Built-in CVC6.0 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 10 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 BT-enabled devices, including iOS / Android / Windows Smart phones Tablet PC and other BT devices.