The N Scale LENZ LE0521W Micro Back EMF DCC Decoder is a high-quality sound decoder designed for N scale model trains. This decoder, made by LENZ, operates on DC power and is compatible with DCC control systems. With its compact size and advanced features, it adds a realistic touch to your model railroad setup by producing accurate sound effects and ensuring smooth operation of your locomotives. Perfect for hobbyists looking to enhance their train collection with reliable and efficient control systems. this is factory new decoder that came out of a large collection. it is sealed in the package however sells as is