Features: Unisex knitted Bluetooth LED hat with 4 built-in and removable rechargeable LEDs. Working time is 10 hours, there is a standard USB port for charging the battery, you can charge it using a car charger, computer or portable power bank.

Longest working time on the market: Bluetooth cap with built-in 300mAh lithium-ion battery can last about 8 hours of talk time and 6 hours of playback time, while other brands only have 120mAh and 1-2 hours of autonomous work.

Unisex, washable, thick sweater: easy to remove, cool to the touch, fully washable, stretchy, fits all sizes and shapes, has 3 light intensity settings. USB batteries included.

Unique Gifts for Men and Women: Upgrade your mobile phone's Bluetooth function with the latest Bluetooth V4.2 technology and sync with any Bluetooth device in seconds, hands-free connection including rejecting/answering calls, wireless music listening, up to 33 feet (10 meters) keeps you warm in winter.