[Designed for Bassists]: This mini amp is a silent amplifier specifically designed for bassists. It allows you to adjust the mix ratio of direct signal and speaker simulation signal, catering to your preference whether you like more of one signal or a balance of both. [Main Features]: The bass amp offers bass signal amplification and cabinet simulation. It comes with three potentiometers for controlling Volume, Tone, and Mix, providing you with a customizable sound experience. [Headphone Output]: Mini amp with a headphone output interface, you can experience the powerful and clear sound of a bass speaker through your headphones. This feature allows you to practice privately without disturbing others. [Convenient and Versatile]: Headphone amplifier is easy to use and portable, allowing you to practice anytime, anywhere. When connected to a CD player or MP3 player, it can play accompaniment and your playing simultaneously, making your practice sessions more effective and enjoyable. [Quality Material]: Headphone amp made of durable ABS plastic. It features a 3.5mm MP3 input plug and a 3.5mm headphone output plug, making it compatible with most audio devices. Brand: JOYO MP3 input plug: 3.5mm Headphone output plug: 3.5mm Color: Black Material: ABS Power supply: Uses 2 x AAA batteries (not included) Package Contents: 1 x Bass Amp Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.