1Built In Clarity and Distortion Mode: Built in 2 tone channels (clear and distortion). You can play the original music and get different timbre by adjusting TONE in the distortion mode, which is more suitable for playing different styles of music. 2Specification: Mini electric guitar amplifier has 3 control knobs: VOL, DIST, TONE. The package contains a 9v battery, which is very suitable for travel use, electric guitar practice, guitar repair station, etc. 3Plug and Play: 1/8in auxiliary (AUX) input jack is used for improvisation with media players or CD music, 1/8in headphone output jack is used for mute practice (When the jack is plugged into the socket, The speaker of the device is muted). 4Mini Electric Guitar Amplifier: This 3in portable guitar amplifier is powered by 9V rechargeable batteries (Including batteries). You can put it in your bag or suitcase. And play music and get your favorite tone anytime, anywhere! 5Reliable Quality and Good Sound Effects: The mini guitar amplifier is composed of high quality and tested components. The key components are surrounded by hard plastic to protect the amplifier from damage.