Digital microphone system for acoustic guitars, equipped with feedback cancellation. - Model Name: iRig Acoustic Stage - Included: Carrying case, pick, cable - Features: Feedback cancellation, tone adjustment, volume adjustment - Connectors: AUX, IN, OUT - Design: Compact and lightweight design Thank you for viewing. This item allows you to output the sound of your acoustic guitar from an amplifier, like an electro-acoustic guitar. You can use it as an electro-acoustic guitar without having to make any holes in your acoustic guitar. Used only a few times in live performances, and there are no major scratches. Box and instruction manual are complete, and operation has been confirmed. To prevent any swapping, a video of the packaging process has been recorded.