Product description Size: 25*10cm Color: gray Material: Polyester fiber+spandex Package content: 1*Bluetooth headband 1*USB data cable 1*Instruction Improved Sleep HeadphonesThe one that launched a world-wide craze! All of our sleep headphone headbands adopts 3D knitting technology, which has good elasticity and breathability.We bring you the original "World's Most Comfortable Headphones". The comfiest, trendiest,and most durable sleep you will ever own. Comfortable Wearing, Stay Cool All Day Sport Headband Headphones are made of durable braided cord and high-quality outer fabric with breathable mesh lining,that stay cool all day. It allows you to listen to your music without having to wear additional , and protect you from being disturbed by your mess hair and sweat.Built-in microphone to let you won't miss any callings. Perfect for gym,makeup,jogging,yoga,etc. Also helps with relaxation,meditation,travel and more. The Best Tech Gadgets Gifts Bluetooth Sleep Headphones and Sports Headphones Headband 2 in1: Washable | Soft | earphone adjustable | size adjustable | HD Stereo Sound. Cool Tech gadgets gifts for Thanksgiving Day,Secret Santa gifts,Birthday,Mother's Day,Valentine's Day and many other gift giving occasions. Sleep or exercise companion for mom/dad/grandparent/husband/wife/brother/sister/teenage boy girl/boyfriend/girlfriend and family,etc. Operation Guide: -Press the on/off button about 5S till the LED light blink from blue-red. -Open the bluetooth in your phone and match with the beanie -After match successfully open the music in your phone, then you can enjoy the music with the hat, press the on/off button can pause it -Press the on/off button, you can answer the phone. press again for up it -Long press the Forward button for volume +,long press the Back button for volume. -Press on/off button 2-3 seconds can back to dial the telephone -When charging the red light bright, charging is complete, the red light will off.