I am selling this item because I purchased it new but have not had the opportunity to use it. I have confirmed that it produces sound when a guitar is connected, but please note that I have not checked any other functions. No original box or instruction manual. This is a multi-functional audio player with guitar effects. - Model Name: JS-10 - Functions: Audio player, guitar effects - Connectors: Guitar/MIC input, USB connection - Display: Backlit LCD - Power: AC adapter Thank you for looking.