The product is a vintage chromatic pitch instrument called The Master Key by Wm Kratt, model MK2-C. It features 13 keys in silver and black colors, suitable for any use. The instrument is made of plastic and metal, and comes with a case for easy transport and storage. This tuner is a unique and stylish addition to any musician's gear collection, offering a vintage touch to their setup. Made in the United States, this Kratt tuner is sure to enhance the overall sound quality and pitch accuracy of any performance.