Built in high-precision ANC inverse noise reduction circuit, which can effectively isolate 85% of background noise. It is equipped with two pin aircraft plug, which can be used in the entertainment system of the cabin. Support microphone call, answer/end/pause/play functions. Folding design, four folding ways, convenient to carry. Weight: 265 grams Package Dimensions: 24 x 21 x 9 cm Microphone Form Factor: Built-In Headphones Form Factor: Over Ear Batteries Required: No Connector Type: Wired