Instant conversion. Perfect for PA systems mixing consoles powered speakers and mic preamps the Radial USB Pro Stereo USB Laptop DI Line Isolator will effortlessly convert digital audio tracks to a pair of balanced analog outputs. Thanks to Plug & Play technology the USB-Pro provides the easiest way to send high quality audio from a laptop to a sound system. Remarkably straightforward when connected the USB-Pro will automatically be listed as an available sound card in the audio settings of all popular operating systems. The 3.5mm output allows headphones to be used to check signal quality; in the unlikely event any noise should be encountered ground lift switches are provided and isolation transformers can be inserted to solve this quickly and efficiently. With the USB-Pro youre guaranteed a clan connection to the PA.