Good condition！ Great noise reduction: built-in ANC inverter noise reduction circuit, reduces 85% of background noise. Ideal for use when traveling by airplane, working in a noisy environment (such as an office or loud coffee shop), or simply when encountering noisy environments in daily life. Makes quiet sound quieter and music sound better. Excellent hafiz sound - stereo wired headset with Premium 40mm diameter driver units ensure a high quality auditory experience Featuring rich bass, as well as powerful and balanced sound. Portable convenience: foldable headphone in combination with the included airplane adapter provides a highly portable listening solution. Real aviation noise cancelling headphones. Perfect companion in cabin entertainment. Long battery life: 3.7V 120mAh Lithium rechargeable battery supports up to 20 hours playing time. Repeatedly charged it without replacing batteries. Two working modes – never worry about being out of power! – the headphones will work as a regular wired headphone without battery (with noise cancelling turned off).