HIGH QUALITY ACTIVE NOISE CANCELING HEADPHONE IN PAKISTAN

i am selling high quality active noise canceling headphone Secification: Built-in noise reduction circuit inverting precision ANC, it can effectively cut off 90% of the background noise. dedicated high-quality noise-style 40mm diameter driver unit, to ensure the highest quality. 3.7v lithium ion battery,it was recharged without replacing batteries. two modes of operation, to choose:noise reduction state (subject to a battery), the normal state (without battery),it was easy to switch. earmuffs imported sponge, soft and comfortable, long wear without fatigue. Technical indicators: Category: Active noise canceling headphones the input terminals: DC*3.5DC Plug 4 working voltage: 3.7V the maximum output power: 90MW the noise level:db the signal to noise ratio (SNR): ≥ 90db power supply: 120mA lithium battery Rated operating time:: 20h noise reduction modes: dual-microphone noise feedback Speaker diameter: 40mm Speaker Impedance: 32Ω speaker frequency response: 20Hz - 20KHz Speaker sensitivity: 115dB the noise level: ≤-78dBA the dynamic range: ≥ 78 dBA Distortion THD: ≤ 0.1% Stereo crosstalk: ≤ -52 dBA headphone wire length: pvc wire, 1.5M Box Open - Never Used - No Warranty