Product information : Headphone material: plastic Color: "Pearl White" mobile phone (Apple/Android) Computer universal "Obsidian Black" mobile phone (Apple/Android) Computer universal Headphones category: active noise reduction headphones Connection mode between left and right cavities of earphone: wireless connection. Dustproof performance: dustproof is not supported. Size Information: Package type: official standard package 1 package 2 package 3 package 4 Packing list: Headphones *1*1/Headphones *1, protective cover *1