This SoundBot SB210 Bluetooth 4.1 Wireless Musical Knit Smart Beanie features a double earpiece design and is perfect for hands-free calling and listening to your favorite music on-the-go. The beanie is compatible with any Bluetooth enabled device and has volume and playback controls conveniently located on the side. The SB210 is rechargeable and even washable for easy cleaning. With its built-in microphone, you can answer phone calls without ever having to take off the beanie. This beanie is the perfect accessory for any outdoor activity or just lounging around at home.