SPECIFICATIONSActive Noise-Cancellation: YesBrand Name: STONEGOCategory: Earphones & HeadphonesChoice: yesCommunication: Wireless+WiredControl Button: YesHigh-concerned chemical: NoneMaterial: PVCOrigin: Mainland ChinaStyle: Wireless headphone & headsetVocalism Principle: DynamicVolume Control: YesWireless Type: Bluetooth 【Feature】Practical foldable design for easy portability and storage. Supports connecting two devices at the same time, and you can switch devices at any...