Electric guitar with built-in speaker Insert a 9V square battery and switch it on. Sound comes out when you turn up the volume. This is a used item, so there are some scratches, but it works without any problems. I have confirmed that the built-in speaker and the external output jack both produce sound normally. After cleaning, the strings have been replaced and adjusted, so you can use it right away. The neck is not warped. There is no scratchy noise. The string height is just right. There is no deadening of notes. A spare 1st string (which breaks easily) and a pick are included. Please understand that this is a used item before purchasing.