... , Very high Signal to Noise Ratio(SNR ):95 Db, Total Harmonic Distortion(THD):0.1%,* Frequency Response: 60 Hz - 20 kHz ... .Laser :Normally it work with the metal ,wooden,and bamboo usb case,the color is the same or similar with the case,and only can make one color ... .Escrow4.PaypalDelivery methodby air ,by sea A:Yes,rush service is available on certain order,please contact us about it. High quality ...