Bluetooth Beanie Hat, Wireless Knit Hat Music Cap with Stereo Speakerphone Headset Earphone Speaker Mic Phone Call for Fitness Running Skiing Skating Walking COLD-RESISTANT,BREATHABLE&HANDS-FREE: Acrylic and polyester material provide the hat with maximum comfort and warmth. Specialized design offers you hand-free music and phone conversation with good sound absorption WIRELESS TECHNOLOGY: Universal Bluetooth V4.0 version with stable signal is available for all Bluetooth devices including smart-phones, tablets, iPhone, iPad, Android, Samsung Galaxy, laptops, PC etc. Wireless range up to 33 feet (10 meters) USER-FRIENDLY CONTROL PANEL: Set-in stereo speaker and microphone on the left earpiece allows you to skip back and forth through your play-list freely, answer and hang up calls without having to use your phone LARGE BATTERY CAPACITY: Built-in high density rechargeable Li-ion battery with ONLY 1 hours charging time can provide up to 60 hours standby time or 4 hours talk/music playback time, also easily recharged by Micro USB (charging cable included) FULLY WASHABLE: No-hassle removal design provides convenience for beanie washing with color retention and non-transformation (Just remove the internal speakers from their pouches before washing)