This is a set including the main unit and AC adapter. No box. After being used a few times, it was stored in a cardboard box. It works without any problems. Please understand that there are some scratches and dirt from use before purchasing. The AT-PEQ3 is a compact, metal-bodied phono equalizer, compatible with RCA output. - Model: AT-PEQ3 - Type: Phono Equalizer - Power Supply: AC Adapter - Output Terminals: RCA Output - Body Material: Metal - Adapter Model Number: AD1503JS Thank you for looking.