Now you can get custom effects from a tiny source that you plug directly into your guitar! Just plug your headphones into the JOYO JA-03 mini amp and youve got a cool sound, directly from your guitar amplified to your headphones. This little mini amp makes your electric guitar sound like an acoustic! Walk around the house and practice wherever you want, all without disturbing anyone around you! Get tube overdrive tone, right into your headphones! Complete with MP3 input for jamming with your favorite band.Specifications:• Mp3 input jack: 3.5mm