<br>As a beginner of guitar, electric guitar, bass, ukulele, are you choosing a suitable speaker for beginners, which is small in size, convenient to carry, and more enjoyable to practice indoors. <br><br>This is not only a amplifier for electronic guitar and bass but a speaker when you connect your cellphone, MP3 or USB flash disk to it.<br><br> Clean and dist, two channels and the dist effects is adjustable. The Gain controls how hard you are driving the amp with your guitar. The Volume controls how loud your amplifier is.<br><br> The Treble and Bass controls help you shape the high and low frequencies of your guitar tone. Powered by 6 AA batteries(not include) or AC adapter(recommended to use).