Fitur: 1. Built-in microphone to let you won't miss any callings. Perfect suitable for gym, workout, running, yoga and other outdoor activities. 2. Play Time Last 6-7 Hour. Upgrade usb rechargeable battery, Built-in high-performance battery. Our Wireless Music headband only charge about 2 hours and provide 6-7 hours playing time. 3. Great Sound Quality with Adjustable Speaker. True HD high fidelity sound featuring latest Bluetooth 4.2+EDR technology that produce great sound quality. 4. The bluetooth can pair your any other Smartphones and Tablets easily. 5. Fabric liner separated from stitching is not defective,it is the place to take out the bluetooth module, so you can full wash the headband. Specification: Bluetooth version:4.2+EDR Charging time: 2H Play time: 6-7H Battery capacity: 180MA Notice: Actual color may be slightly different from the image due to different monitor and light effect.