SoundBot&uml; SB210 HD Stereo Bluetooth 4.1 Wireless Smart Beanie Headset Musical Knit Headphone Speaker Hat Speakerphone Cap,Built-in Mic (BLK) SOFT, SENSIBLE, COMFORTABLE, & WARM - Features premium double soft knit to provide the maximum comfort, delicacy, and secure-fit mobility for most versatile lifestyle indoor, sports-active outdoor, or everyday usage without compromising the convenience. LOUD & HD MUSIC EXPERIENCE - Enjoy enhanced music listening experience with advanced digital sound, balanced deep bass, dynamic mid-range, & crystal clear high note while staying warm, delivered by high performance stereo loudspeaker driver. ONE SIZE FIT ALL & UNIVERSAL WIRELESS TECHNOLOGY - Stretchable high quality knit material to fit all sizes and shapes. Universal Bluetooth v4.0 technology with forward/backward compatibility to connect to all other Bluetooth enabled media player devices including smartphones, tablets, iPhone, iPad, Android, Samsung Galaxy, laptops, PC,... etc. HUMAN ENGINEERING DESIGN - Intuitive control buttons & high density built-in rechargeable battery to manage 7hrs of hands-freecalling and 5hrs of wireless remote music streaming, from up to 33 feet of distance with freeline of sight. Built with easy-access MicroUSB charging port (MicroUSB Cable included). FULLY WASHABLE - Unprecedented zipper and velcro design to remove or re-install headset speaker driver and battery component easily in seconds from the beanie for washing purpose. 100% risk-free 1 year manufacturer warranty included.