Humanize Designed Weight only 8g, lightweight and secure, comfortable fit with most shape of ears. While you moving around or working out won't popping off. Very suitable for answering calls or listening music. High Quality Bluetooth headphones built-in HD Microphone,Noise Cancelling technology, reduced the outside noise, you can enjoy the amazing sound quality with superb deep bass and crystal clear treble. Cable-free connection for reliable audio streaming from almost any device at a range of up to 10m. Bluetooth 4.1 Technology Featuring the latest wireless Bluetooth 4.1 technology, that ensure the stable signal, And widely compatible with most cell phones, tablets and other Bluetooth enabled music devices. Long Battery Life Built-in 3.7V/ 80 mAH lithium battery, allowing you to enjoy your music for a long time up to 3-4 hours, up to 4 hours of talking time, and 50 hours of standby time with a quick charge of only 30 minutes. During the charging process, the indicator light will turn red, and after full charge, the indicator light will turn blue. Please unplug the charger at this time.