Description. Features:. - The Bluetooth headband can keep your head warm; and you can listen to music without wearing other headphones.. - The Bluetooth headband can protect you from being affected by hair and sweat. At the same time, the built-in microphone let you not miss any calls.. - Made of acrylic fiber, it is comfortable to wear. What is most important is that it is soft, washable, and breathable.. - Equipped with built-in 150mAh high-performance battery, the headband can be charged via a USB cable.. - LATEST BLUETOOTH V5.0 & LONG PLAY TIME OVER 8HOURS. Advanced bluetooth V5.0 not only provide you easy, fast and stable pairing and connection with phone, but also consumes much less power! About 2-2.5hours' charging gain approximately 8hours' playing! Wireless technology allows you to listen to music in a cordless way. Specification:. - Color: black/Grey. - Material: acrylic fiber. - Bluetooth version: V5.0. - Bluetooth continuous working Time: more than 8 Hours. - Indiactor: Red light means charging is in progress.. - Transmission distance: 10 meters. - USB: Micro USB. - Power supply: 150mAh lithium rechargeable battery. - Applicable objects: men and women. - Charging time: About 2 hours. - Continuous working time: up to 3.5 hours. - Size: 27cm*10cm. -Weight: 80G. Packaging included:. 1*Bluetooth headband. 1*USB charging cable. 1*User Manual