Product information:Bluetooth version: 5.0Bluetooth transmission distance: 10 metersMusic playback time: maximum sound 7H, average volume 10 hoursMicrophone distance: 1 meter Bluetooth standby time: 72HBattery capacity: 150mA/hBattery power: 0.55WFrequency range: 2.4-2.4835GHz Charging time: 1-2 hours< br/>Weight: 80gSize: 27cm * 10cm Packing list:1 * Bluetooth head cloth.1 * User manual .1 * Charging cable Great multi-functional sleep headphones: Sleep Headphones &amp; sleeping mask &amp; Sports headband 3 in 1. The sleeping headphones let you listen to music without wearing extra headphones and protect you from interference from your messy hair and sweat; . The sleep headphones have a built-in microphone, so you won't miss any calls. Very suitable for fitness, exercise, running, yoga and other outdoor activities. Longer service time &amp; High-quality playback: Bluetooth sleep headphones come with an upgraded USB rechargeable battery that charges for about 2-2.5 hours and provides more than 10 hours of playtime. High-quality circuitry ensures clear sound and lossless music. Built-in microphone and volume control buttons, allowing users to answer phone calls hands-free and play the previous/next song without using the phone Super soft and breathable headband Headphones: The Bluetooth headband sleeping headphones are extremely soft and lightweight. Made from durable braided cord, it has a breathable mesh lining, stretches easily to fit all head sizes, is also incredibly soft and hypoallergenic. Bluetooth Stereo Sound with Thin Speakers: The thickness is only 0.25 inch speaker, which is very convenient for side sleepers. True HD HIFI sound with the latest Bluetooth technology that provides amazing sound quality. With Bluetooth, you can easily pair your iPhone X/ iPhone 7/ iPhone 8/ iPhone 6 or other smartphones iPad tablets. Compatible with Android and iOS. Headband headphones with an exquisite packaging is the gift for your family or friend Satisfactory guarantee: Achieve your best night's sleep with a Bluetooth headband sleep headphones that create a private space for you, where you can not only sleep better but also enjoy your music time .