Music is a super companion for humans, which can make you relaxing and enjoy colorful life. A portable music player device is essential for music lover. We are be honored to recommend the  S66 Stereo Bluetooth 4.1 Headphones to you. S66 is specially designed for music lovers and travel enthusiast, which features Advanced Bluetooth 4.1 technology, Built-in high-performance Microphone & Speaker and TF Card Playing Function. S66 will offer you wonderful music, you can greatly enjoy your favorite Musician, a super companion for you during daily life and travel.      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]2 in 1 Multifunctional: Adopting Bluetooth 4.1 Wireless Technology (Easy to pair with almost any Bluetooth-enabled audio players devices), also support TF Card (up to 32G) Playing Function, offering more memory space to store you favorite audio files. In additional, S66 Bluetooth Headphone is equipped with Function buttons, which enables easily control headset, music and Smartphone.[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 / 6 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.Specifications:Model: S66 Type: Over-ear Stereo Bluetooth Headphone Bluetooth version: 4.1 + EDRSupport Profiles: HSP, HFP, A2DP, AVRCP.Profile and Advanced Audio Distribution Profile(A2DP).Operation Distance: up to 10m; Transmitting Power: Class 2.Frequency Response: 20 ~20KHzPower Rating: 100mWSpeaker Diameter: 40mm Resistance: 32ohmSensitivity: 105dB ± 3dBRechargeable Lithium Battery: 300mAhWorking Voltage: 3.7VCharging Voltage: 5VTalking Time: up to 10 hoursMusic Playing Time: up to 6 hoursStandby Time: 120 hours  Charge Time: About 2 hoursColor: Rose Gold,Black (Optional)Main Item Size: 21.0 * 19.0 * 6.8cm / 8.26 * 7.48 * 2.67inItem Weight: 182g / 6.4ozPackage size: 24.0 * 22.0 * 8.0 cm / 9.44 * 8.66 * 3.14inPackage weight: 385g / 13.6oz