Amazon.com: Rotibox Bluetooth Beanie Hat Wireless Headphone 。Stay warm and connected with the Rotibox Bluetooth Beanie Hat, a stylish and functional winter accessory perfect for outdoor sports and everyday use. Made from 100% soft acrylic, double-knitted fabric, this cozy beanie provides exceptional warmth while featuring a built-in Bluetooth V5.0 headset for wireless music and hands-free calls. Ideal for running, skiing, hiking, camping, or casual wear, this beanie combines comfort, style, and technology in one! Key Features: ✔ Soft & Warm Design: Crafted from double-knitted acrylic, ensuring superior warmth and comfort. ✔ Bluetooth V5.0 Technology: Fast & easy pairing with smartphones, tablets, and other devices. ✔ Wireless Music & Calls: Built-in stereo speakers & microphone allow hands-free calls and music playback. ✔ Long Battery Life: 8-10 hours of talk/playtime, 60 hours standby, with a quick 1-2 hour recharge (USB cable included). ✔ User-Friendly Control Panel: Easily skip tracks, adjust volume, and answer calls with the left-side control panel. ✔ Perfect for Outdoor Activities: Great for running, skiing, snowboarding, skating, hiking, dog walking, and more.