Double BT 4.0 Earpiece, Megadream Sports Two Wireless A2DP/AVRCP Stereo In Ear Earbud w/Mic Support Stream Music/Video/Audio with Charging Station for Gym Running Yoga Driving Jogging Cycling AUDIO QUALITY: The BT headphones are made of active noise cancelling technology, for super bass and 3D stereo sound. Noise cancellation makes you enjoy a clear sound in noisy occasion. Rubber adapters, unique flexible design and custom earbuds ensure you get it perfect fit and remain stable in your ear, suitable for sports workout, music enjoying LARGE POWER CAPACITY: Built-in Powerful rechargeable battery 65mAh battery to provide 4 hours of Talking/Playing time and storage box offers 5 times' full charged to the two headphones COMFORTABLE: The headphones are designed fit perfectly for ears, 3 couple of earbuds for replacement, suitable for sports, music enjoying, and phone call function with mic ADVANCED TECHNOLOGY: Upgraded aerial and BT V4.1 with 30ft BT distance. Work with smartphones, tablets and other devices. (Note: The Left earphone can only be pairing with the Right, could not be connected with BT device.) UNIVERSAL COMPATIBALITY: D900S headphones can work seamlessly with your Apple iPad, iPhone, iPod Touch, Android Smartphones, Tablets, Windows laptops, desktops, chrome Books, BT-enabled music players and more