The Whirlwind pcDIhwb is a PCDI with a hard wired tail terminated with a stereo 3.5mm plug, perfect for interfacing the outputs of CD players, computer sound cards, iPODs® / MP3 players, tape decks, etc. with professional, balanced, low impedance equipment. (with no chance of losing the cable) This unit contains two separate DIs - input your signals with one hard wired, 30 inch 3.5mm (1/8") mini TRS stereo plug, two sets of color coded RCA phono type input and through jacks or 1/4" TS input jacks. Output is via corresponding color coded XLRs. Whirlwind PCDIHW Features: Color coded RCA phono in / through jacks 3.5 mm input plug on a 30" hard wired cable 1/4" TS input jacks Color coded XLR output jacks Ground Lift switch to help eliminate hum and buzz Stereo/Mono switch for stereo operation or safely combine both inputs into a mono signal sent to both outputs 20dB pad switch for connection to "hot" input signals Uses Whirlwind's TRHL-M transformers with metal shield Whirlwind PCDIHW Specifications: Impedance Ratio (input to output, per channel): 133:1 Frequency Response: 20Hz-20kHz ±1dB Level Change (input to output): -20dB (pad out),-40dB (pad in)