Product information: Color black Bluetooth protocol: 5.0 Transmission range: 15 meters Size: 21.5 * 22 cm Function: Battery indicator, call function, music support Packing list: 1 * Bluetooth LED lighted hat Stable, integrated Bluetooth headphones The updated Bluetooth 5.0 wireless technology provides a stable and firm connection to the Bluetooth headset, supports playing music and calls as well as quick and easy coupling with your device. The maximum transmission distance of bluetooth headsets can reach 15m. Built-in stereo speakers and a microphone can improve your music listening experience and call quality. Washable Beanie Hat Our beanie hat can be hand washed or washed in a washing machine. We recommend doing it by hand with water below 40 Wash C so that the hat is not easily deformed. Please remove the LED light and bluetooth headset from the hat before washing. Keep warm and have fun. The beanie cap is made of ultra-soft, stretchy acrylic insulating material that has high elasticity to provide maximum comfort and keep you warm in cold weather. With the built-in headset with hi-fi stereo sound, you can immerse yourself in the world of music and achieve a better music experience while walking or running. & nbsp;