Pair with iPhone, Android device, or tablet in seconds. Listen to music and take phone calls with built-in mic. Great style and warmth for winter weather. Stereo sound with left and right speakers. Bluetooth 4.1 gives you the best sound quality. Machine washable; just remove Bluetooth module and wash with laundry. 60 hours standby, 6 hours play time, 2 hours charging. Color-coordinated control panel allows switching songs and answering calls. One size fits most.