Enjoy Longer Use: This LED Bluetooth knit hat features a built-in rechargeable battery, providing 2-6 hours of use on a 2-hour charge. It supports flexible charging via Type-C cable, compatible with car chargers, computer USB ports, and power banks. Warm and Comfortable: Made of acrylic, this illuminated Bluetooth knit hat boasts excellent elasticity and breathability. Soft, warm, and comfortable to wear, it also offers good wind protection. One size fits all, suitable for both men and women. Three Lighting Modes: This illuminated Bluetooth knit hat offers three practical modes: medium brightness, high brightness, and dual flash mode. Versatile and ideal for nighttime cycling, jogging, or maintaining clear visibility in emergencies. Perfect Gift Choice: This unisex Bluetooth knit hat combines stylish design with practical functionality. Made from soft, skin-friendly fabric, it provides lasting warmth and comfort, making it a perfect gift for family, friends, or loved ones during holidays such as Christmas, Thanksgiving, and birthdays. Bluetooth Connectivity: This illuminated knit hat and Bluetooth headset feature a newly upgraded Bluetooth 5.4 chip, providing a stable and reliable connection range of over 10 meters (33 feet) in open environments. The headset is equipped with 30mm high-quality speakers, delivering 106dB of clear stereo sound, and the Bluetooth module features three-button controls for easy operation. It perfectly combines reliable connectivity with an immersive audio experience.