OOTDTY Features: brand new and high quality Build-in electronic headphone, convenient for enjoying the music in the cold weather any time any place you want. Can adjust volume. The main funcition the ear muff can connect with your smartphone with the bluttooth, listen the music in the outdoor chilly weather. Charging method: USB charging, very convenient. Charge about 2-3 hours provide more than 4-6 hours playing time. Fully covers ears as you take on your winter adventures such as snowboarding, skiing, ice skating, camping, hiking, and more. It can be folded to a compact form for easy storage and portability. Comfortably cover your ears and stay comfortably in place. Keeping the wind and cold out, and your ears warm. Stylish solid color design, perfect winter gift for yourself, your friends, and your family 1 earmuff only, other accessories demo in the picture are not included Instructions for use: 1. There are three buttons on the side of the earmuffs. The middle pause button is the power on and off button, long press the button, power on or off. 2. Short press the middle button for functions such as playing music, pausing music, answering calls, hanging up calls, etc. 3. The two button buttons next to it are used for volume addition and subtraction and switching songs. Short press two buttons for volume addition and subtraction, long press to switch songs. 4. boot, use the phone to search for Bluetooth. 5. The phone can display the power of the earmuffs. 6. Note: earmuffs are not washable. Specification: Material: Plush Plug type:Wireless Wireless type: Bluetooth Using time: 4-6 hours Charging time: 2-3 hours Compatibility: Bluetooth Support Devices Head circumference: 56-58cm(22.05-22.83in) Optional Color: Beige, Black, Camel, Gray, Flesh Pink, Pink Quantity: 1 set Warm prompt: 1.Asian people size is 1 or 2 sizes smaller than European and American. 2.Please note that low temperature washed,do not bleach and place under the blazing sun for quite a long time. 3.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 4.Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding Package includes: 1 x Earmuffs 1 x Charging Cable 1 x User Manual(without retail package)