The amplifier and headphones have been tested and confirmed to produce sound using both an adapter and batteries. There is no noise or crackling that would interfere with playing. Please check the photos for the condition of the item, as it is a used product. The neck is almost straight. There is plenty of fret life remaining. The truss rod has not been checked. The bridge is not lifting. The seller has not used the item themselves, so the frequency of use is unknown. Fine adjustments such as intonation and string height should be made to the buyer's preference. The item will be carefully packed with bubble wrap and cardboard for shipping. As recommended by Yamato Transport, the strings may be slightly loosened for shipping.