FURUTECH Phono equalizer equipped with USB-DAC & ADC [USB & analog input and output corresponding interface] ADL "Alpha Design Labs" GT40&alpha; (Alpha) Format: USB digital & analog input and output and recording compatible audio interface Connection method: USB input and output (B terminal) x 1 headphone switch / terminal x 1 Input .... analog (RCA) x 1 output ... analog (RCA) x 1 Dimensions (width  depth  height): 150 (W)  111 (D)  57 (H) mm / Weight: about 650g English / Japanese manual URL (PDF):http://www.furutech.com/images/2014/12/gt40a-manual.pdf