This is a Casio GUITAR DG-1. Power on confirmed. Powered on with batteries. Sound output from the built-in speaker, volume adjustment, playback/stop of built-in music, and other functions all worked without any problems. Adapter is not included. Two strings are missing, so please prepare nylon strings. Strings Same 6 strings as a regular guitar. Material is nylon. No tuning required. They are simply strung with appropriate tension. Vibrations are detected by the vibration sensor on the main unit. Soft case, strap, and hex wrench are included. Everything in the photos is included. Operation confirmed with 6 AA batteries. Batteries are not included. Although this is an old item manufactured several decades ago, the exterior is relatively clean. This is only my personal opinion, so please check the photos. There is some rust on the spring part of the battery compartment. Please check the condition in the photos. Type: Electric Guitar Color: Black Shipping will be in a guitar case with bubble wrap. This is a used item. Please understand that this is a used item before purchasing.