Product DescriptionThis mini headphone amp for your electric guitar is powered by 2 x AAA batteries. All you need to do is plug it straight into your guitar output jack， attach a set of headphones and you’re ready to play! The GP-1 produces classic British distortion sound and has an AUX input for an audio player.Box ContainsNux GP-1 Mini Guitar Headphone AmplifierNote: Battery not included in the package.