Whether You Play Guitar, Ukulele, Mandolin, Or Another Acoustic Instrument, The Blackstar FLY 3 Acoustic Delivers Amazing Sound When You’re Out And About. This 3-Watt, Battery-Powered Acoustic Amplifier Has Wonderful Features Like Echo And A Flexible Shape Select Switch, Giving You All Kinds Of Tonal Choices. And With An MP3/Line-In Jack, The Fly 3 Acoustic Can Be Connected To Your MP3 Player, Mobile Phone, Laptop, Or Tablet So You Can Jam Along To Your Favorite Tunes.