Features: brand new and high quality Illumination cap with bluetooth-compatible music, soft hand feeling, no ball, no fading, stain resistance, breathable, durable. 3 levels of brightness adjustment, a loading and unloading port is left on the back of the hat, and the LED light is easy to disassemble for easy cleaning of the hat. The LED bluetooth-compatible woolen hat is a great Christmas gift, suitable for men, fathers, husbands, ladies, mothers, boyfriends, girlfriends, him or her. It is also the first choice for Christmas, Thanksgiving, family gatherings and friends. for Ideal for machinery, morning/night running, dog walking, fishing, camping, hiking, hunting-, snow shoveling, traveling, night barbecue, bicycle riding, and even car and home repairs. The built-in microphone and speaker support music and calls, the stereo sound is beautiful and clear, and the call is stable and continuous. Easy to use. Specifications: Material:Wool Hat approximately 20-21cm in width Suitable season: winter, spring, autumn Color: Navy/Fluorescent Yellow/White/Black/Sapphire Blue/Red/Camouflage Green/Camouflage Yellow Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x LED for Smart Cap