The advanced 180's Bluetooth HD Ear Warmers are a cut above anything else available. Bluetooth Wireless Technology allows you to take calls and listen to music from other Bluetooth-enabled devices. Siri and Google Now activation feature Hi-Definition Speakers that provide dynamic, rich sound. Talk time: 9 hours; Play time: 8 hours Standby time: 100 hours on a full charge. USB charging cord included. A soft shell body and grid fleece lining provide warmth and comfort with the added protection of wind and water resistance. Features: Adjustable click-to-fit frames allow the ear warmer to comfortably fit a wide variety of head sizes Bluetooth wireless technology allows you to take calls and listen to music from other Bluetooth enabled devices Collapsible for easy storage in a pocket, purse, briefcase or bag Hi-Definition speakers Patented behind-the-head design fits comfortabl