[Designed for Bassists]: This mini amp is a silent amplifier specifically designed for bass players. It allows you to adjust the mix ratio of direct signal and speaker simulation signal, catering to your preference for more of one signal or a balanced blend. [Main Features]: The bass amp offers bass signal amplification and cabinet simulation. It includes three potentiometers for controlling Volume, Tone, and Mix, providing a customizable sound experience. [Headphone Output]: This mini amp features a headphone output interface, allowing you to experience rich, full bass tones through your headphones. This enables private practice without disturbing others. [Convenient and Versatile]: The headphone amplifier is easy to use and portable, supporting spontaneous practice anytime, anywhere. When connected to a CD player or MP3 player, it can play accompaniment and your instrument simultaneously, enhancing practice effectiveness and enjoyment. [Quality Material]: Constructed from durable ABS plastic, this mini amplifier is built for longevity. It features a 3.5mm MP3 input jack and a 3.5mm headphone output jack, ensuring compatibility with most audio devices. Brand: JOYO MP3 input jack: 3.5mm Headphone output jack: 3.5mm Color: Black Material: ABS Power supply: Requires 2 x AAA batteries (not included) Package Contents: 1 x Bass Amp Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.