The ARX USB I/O features full transformer balanced Inputs and Outputs, providing the isolation required to eliminate earth loops / ground hum and other extraneous interaction noise and distortion. It installs as a fully compatible generic USB audio device, requiring no special driver program installation on Mac OSX, Win XP and Vista. The front panel has Left and Right transformer balanced analog XLR Input and Output connectors that connect to any standard balanced analog inputs and outputs. On the rear panel there is a Type B USB connector, as well as a ground lift switch and a status LED that indicates the USB I/O is connected and operating. It is ideal for interfacing any USB equipped computer (especially notebook/laptop computers) with the balanced inputs and outputs of professional sound systems. Security features include Kensington?-type computer lock slot and optional bracket kit for under-table mounting. The ARX USB I/O is available in Dual Channel format, and is hand made in Australia.