1,hotselling model 2,good quality 3,Noise cancelling 4.factory price 5.one-stop service,drop shipping,fast delivery Product specification:Product type : moving coil headset Wear : headsetPower output:0.5w*2, Frequency Response:20-20000HZ Input:Φ3.5 -jack Total Harmonic Distortion:0.1% Separation:>40DB Noise reduction mode : active noise reduction 2012 new design headphones colorful--black