A Bluetooth headband with built-in Bluetooth features a convenient microphone that is highly sought after. This warm and stylish headband not only keeps you cozy but also provides a modern way to make calls and listen to music while keeping your ears warm. The headband is beautifully knitted and includes buttons for volume control, play, and pause. Incredibly warm, fashionable, functional, and comfortable, it is perfect for chilly winter days. Suitable for all genders. Charges effortlessly with the included USB cable. Stylish and comfortable knitted headband. Material: Polyester, Cotton. Find the device in the Bluetooth list. Range: 10 meters. Frequency response: 20Hz-20kHz. Dimensions: 24 x 10.5 x 1.5 cm. Battery: 200mAh lithium battery. Speaker: 30 mm. Charging time: 2 hours. Use time: 10 hours. Bluetooth version: 5.0. Weight: 132g.