Check the listing for details. ART Pre-amp USB Dual Pre Project Series. Condition: Open box. Listed at 95.00 USD. This ART Pre-amp USB Dual Pre Project Series is a great addition to any musician's setup. With two inputs and outputs, it's perfect for recording or live performances. It features a preamp designed specifically for microphone use, and supports USB audio input. The brand is well-known for their high-quality musical equipment, and this preamp is no exception. The ART Pre-amp also has a number of other features, including audio inputs for USB and number of channels, making it a versatile piece of equipment for any musician. Its sleek design and durable construction make it a reliable piece of equipment for any music studio. It's a must-have for any musician looking to enhance their sound. In conclusion, I know that the item is in fantastic condition and has never been used. In fact there had never been a 9 volt battery placed in it for use.