Input:2* 1/ 4'' unbalanced mono audio jacks (Impedance value:1Meg ohm)Output:2* 1/ 4'' unbalanced mono audio jacks(Impedance value:470 ohm)Power Supply:DC. 9V 300mA Center negativeDimensions:85x120x33mmWeight:0.367KGAccessories:Safety Instruction & Warranty Card,Sticker,quick guideInput A/ D Conversion:Sampling Rate: 44.1 kHz; Sampling Accuracy:24 bit; Dynamic:103 dB; Frequency:20Hz~20KHz, +0 / -1 dBOutput A/ D Conversion:Dynamic:106 dB; Frequency:20Hz~20KHz, +0 / -1 dBUSB Output:Type:Type-B Micro USBOutput EXT CTRL:1/4'' TRS jack x 1