NB02 wireless Bluetooth headphone by Avantree provides the innovative idea with tangle-free. Not only unique stylish Magnetic attraction to let you become a fashion icon and also ultra-light weight to make you all day comfortable. Outstanding long battery life time to make it as your awesome traveling companion. Product Specification * Bluetooth V4.1 * Support profiles: HSP, HFP,A2DP, AVRCP * Operational range: Class 2, 10 meters * Talk time: up to 10hrs * Music time: up to 10hrs * Headset weight: 28g What's in the box? * Bluetooth headset * USB charging cable * Quick User guide * User manual * Ear buds We offer 12 Months for normal use. Live online support, Telephone Support, and email support are available. Video user guide are available also from Avantree site. Support Any issues or suggestions, contact us via our US toll free No, Intl number, OR email us and 1 business day reply is guaranteed. We are committed to 100% customer satisfaction.