Radial USB-Pro 2-channel Active Instrument Direct Box High performance 24bit/96k stereo direct box Automatically installs without the need of a driver Built-in headphone amplifier for monitoring Balanced Lo-Z outputs with switchable isolation Automatically installs without the need of a driver Built-in headphone amplifier for monitoring Balanced Lo-Z outputs with switchable isolation 1kHz conversion rates, the USB-Pro elevates the performance with true 24 bit, 96kHz stereo converters to deliver more headroom and greater detail