NEW BEE N9 Pedometer APP Sports Wireless Folding Bluetooth Headphones HIFI Earphones Smart Stereo Headset w/ NFC(Black+Red) With a smart APP(Android only),keep record of your fitness activity with the built-in pedometer provides the exactly how many calories you have burnt and the distance you have covered. Built-in microphone for hands-free phone calling;Foldable design and portable packing;Voice prompt system has 4 kinds of language,such as Chinese,English,French and Spanish. When it prompt 'Low voltage',please using the 5V Micro USB cable to charge.The red light indicator lights on when charging,the blue LED indicator lights on when charging finished. Crustal clear and high-fidelity sound with Bluetooth 4.0 Technology.With NFC function,the New Bee-9 connect to any Bluetooth-enabled device will be quicker. With built-in high-quality rechargeable Li-ion battery provide roughly 45 hours of music play,60 hours of phone call,180days standby time.(Battery performance varies with correct using and maintenance.)