Sharper Image Smartphone Bluetooth Hat is a wireless headset integrated into a knitted hat, providing warmth and hands-free calling and music streaming capabilities. The built-in microphone allows you to answer or make calls, while the Bluetooth 4.1 + EDR technology ensures a stable connection to your smartphone or other Bluetooth-enabled devices. With up to 6 hours of talk time and 60 hours of standby time on a single charge, you can enjoy your music or calls all day long. The hat is also machine-washable, as the control panel and speakers can be easily removed before washing.