This is a compact, portable guitar amplifier. I purchased it several years ago and kept it in storage for a while. It was used infrequently, only occasionally. Confirmed power with batteries. Connected to a computer and confirmed sound output through speakers and headphones. Cannot confirm operation via guitar input as I do not have the environment to test it. Please understand that this is a simple operational check. *Batteries are not included. Specs ■ Type: Combo ■ Rated Output: 3W ■ Number of Channels: 2 ■ Speaker: 3" x 1 ■ Dimensions (cm): 17.0W x 12.6H x 10.2D ■ Weight (kg): 0.9 ■ Features: ・MP3 Line In ・ISF control for a wide range of sounds from American to British ・Emulated Line Out for recording and headphones ・Delay effect simulating tape delay sound ・Battery powered (6 x AA batteries) ■ Notes: *Adapter sold separately.