Designed for plug and perform convenience, noise-free digital-to-analog conversion and, of course, the rigors of the road, the On-Stage DB2150 DI Box features 2.0 full speed USB connection, 10hz to 20Khz frequency response and 90db dynamic range. Automatically recognized as an available sound card by all Windows and Mac operating systems, the DB2150's discrete, stereo-balanced XLR outputs provide pre-mix level and signal integrity monitoring via the 3.5mm headphone jack, while iso left/right and mono-sum switches guard against phase issues and facilitate monophonic transference. And because the last thing you need is hum, custom-wound resistors isolate and eliminate ground loops.