Sport Wireless Bluetooth 4.1 Stereo Headsets/Headphones/ Earbuds With Mic Hands-free (Green) Bluetooth 4.1 Stereo Wireless Headphones, built in microphone and remote control, you can easily control music, adjust volume, take and make phone calls. 4.1 bluetooth core, strong bluetooth signal, built-in Mic for hands free calling, built-in rechargeable battery, up to 8 hours of Talk/Play Time. Thrilling sound quality, High-fidelity stereo music and clear speech, Unique sound cavity structure, Greatly reduce the headsets sound leakage, Top CVC 6.0 noise reduction, Perfect isolation outside noise. High definition crystal music, HD super real voice, Spatial sound reproduction, the Headphones 's trump card ever since, is noticeably more three dimensional and offers a much larger spatial image. Waterpoof, Dustproof Dweatproof material, Lightweight, Durable design, you can fully enjoy the music, sport comfortably and freely.