Sound output has been confirmed. There is no noise or crackling that would interfere with playing. The battery case lid is missing. Please check the condition of the item in the photos as it is a used item. Batteries and a new compatible power adapter are included. The neck is almost straight. There is plenty of fret life remaining. The truss rod has not been checked. The seller has not used the item themselves, so the frequency of use is unknown. Please adjust the pitch, string height, etc. to your liking. Shipping will be done carefully with bubble wrap and cardboard.