Knitted Cap With Built-in Wireless Bluetooth Headset Bluetooth 5.0 Keep Warm From The Cold Texture Soft Elastic Ventilate Suitable For Most People Features: Product Name: Knitted hat Bluetooth headset Product color: Blue Material: wool Gross weight: 105g/0.231lbs Packing size: 24*19.5*2cm/9.45*7.68*0.79in Bluetooth version: 5.0 Connection range: 0-10m Input voltage: 5V 1A Charging time: 1h Sensitivity: 1053dB Impedance: 32 : Warm Bluetooth headphone knitted cap, texture. The clear texture of, without a little impurity, is more suitable for winter. The combination of technology and clothing design is very novel. This wool knit cap has a built-in wireless Bluetooth 5.0 player that supports Bluetooth connection to play music. The player function button is provided on the side of the knitted cap for easy . The built-in Bluetooth headset can get up to 15 hours of battery life on a full charge. Elasticity is suitable, comfortable and warm. Knitted cap soft and elastic, not tight, strong wrapping. Flexible suitable for people with different head sizes to ensure comfortable wear. The knitted hat is easy to fold at will, leaving no wrinkles and convenient storage. Choose the Australian wool. Warm and comfortable, suitable the scalp, not easy to lose hair. Skin friendly suitable, lock in the temperature, soft elastic. High density, heat storage and temperature lock. Keep the heat circulating and wear warmer. The wool material is treated with antistatic treatment, which makes it more comfortable to wear and effectively avoid electrostatic trouble when wearing off. Knitted hat breathable not stuffy, hair is not easy to oil. Permeability refers to the permeability of gas to polymer materials such as films, coatings and fabrics. Package Include: 1*Knitted hat Bluetooth headset 1*USB charging line