The Antares Autotune ATR-1A Vocal Processor is a rack-mountable unit designed for professional audio applications. With two channels and vocal effects/pitch correction capabilities, this Autotune processor by Antares is ideal for enhancing and perfecting vocal performances. The 1U rack unit is coloured in grey, making it a sleek and compact addition to any studio or live setup. The model ATR-1A is known for its high-quality performance and reliability, making it a popular choice among musicians and audio engineers. This particular unit is faulty, powers up, but nothing on the display. Maybe I’m not using the right power adapter for it, if you have the correct one – then this one will be great bargain for the price. Collection is also option.