KAMII Outdoor Bluetooth Beanie Hat Wireless Bluetooth Headphone Headset Earphone Stereo Speakers & Mic Black (Black) 60 hours standby time and 6 hours talk time,easily re-charged by USB (cable Included) Syncs to any Bluetooth device in seconds such as iPhone,Samsung,HTC High quality built-in stereo speakers that produce excellent sound quality The headphones built-in the hat are removeable , convenient for beanie washing Bluetooth A2DP,Stay warm and enjoy hands-free music and calls,perfect for outdoor sports running skiing skating hiking working out dog walking holiday travelling and so on,medium weight is perfect for spring,fall, winter