• The JA-03 is a pocket bass headphone amplifier that provides clean and powerful sound to practice quietly
• Plug and play, an simple bass practice amp for guitar beginner with Aux In, Mixer, Tone knobs, multiple tones are available
• 3.5mm Headphone output of mini bass headphone amps for slient practice and no worrying about disturbing family
• Play along with CD/MP3 player by 3.5mm Aux In jack
• Tip: power by 2x AAA Batteries (including in package). If the product is not used for a long time, first remove battery to prevent damage to bass amp caused by battery leakage problem