CFZC Bluetooth Beanie Hat Cap Wireless Headphone Knit Winter Soft Warm Music Hat with Stereo Speaker Hands-Free for Men and Women Outdoor Sports Gifts (Black) 100% Acrylic material, knitted beanie, soft and warm. V4.2+EDR Bluetooth version, available for most of devices with Bluetooth function. You will look great and keep warm while litsening to your favorite music. Keep the sound track to your life playing all the time. Perfect sound quality and super bass effect, you can enjoy your music while you are walking, hiking, jogging, skating, fishing...Keep you warm in chilly days. Large battery life gives it 60 hours standby time and 3.5 hours talk time. Then easily recharged by Micro USB (charging cable include).