Great Noise Reduction Built-in high-precision ANC inverter noise reduction circuit reduce 85% of background noise. Stereo headphones with 40mm stereo drivers for amazing bass clean crisp highs and mids.</br>Lightweight for TravelFoldable Hinges and ultra portable design makes them easy to travel with. It comes with two-pin adapter plug perfect companion in cabin entertainment. Real aviation noise cancelling headphones.</br>Long Battery Life3.7V 120mAh lithium rechargeable battery supports up to 20 hrs playing time. Repeatedly charged it without replacing batteries.</br>ComfortComfortable around-ear headphones with premium memory foaming ear pads it has noise cancellation even turning off the active noise cancellations.</br>Easy to UseSupport microphone call answer / end pause / play function.</br></br>Product Description</br></br>Whenever you want a quiet space or an auditory feast  the MonoDeal active noise cancelling headsets are your best choice. With lightweight design adjustable headband and soft earmuffs?? it is comfortable to wear all day long for travel?? work and anywhere in between without fatigue or oppression. The high-precision noise reduction circuit effectively reduces 85% of the background noise?? helping you focus on what you want to hear - whether it's your music?? your calls or simply peace and quiet. <p> <b>Works in either mode</b> <br>It works in two modes?? noise reduction state or common headset state. When battery runs out?? it still works on common state. <p> <b> Rechargeable bat