Please be sure to read the product description ☆ ART TUBE PAC Preamp/Compressor Guitar Bass Amp PAC This is a preamp & compressor with a built-in vacuum tube (12AX7). It can be used for microphones, electric bass, guitars, and anything else. Power-on tested only. Please check the condition in the images and make your own judgment. Please understand the above contents. Those seeking a perfect product or those who are nervous about the condition should refrain from purchasing.