If you are looking for a durable and multipurpose bass active circuit, I can tell you that our product will be one of your . Use quality materials, can use it for a long time. Although the design is simple, it is very practical to use. Features -Color:Black -Material:Plastic, metal -Size:4.00X3.10X1.10cm/1.57X1.22X0.43in -Volume: B50K -Pickup: MN250K -Bass: +/- 14dB 80Hz B100K -Middle: +/- 8dB 900Hz B100K -Treble: +/- 23dB 3-7KHz B100K -Simple and easy to install, also convenient to remove. It is a must-have product for friends who like bass. -Suitable for guitar or bass, improve the bass or guitar using effect and bring you a good mood. -This is a must-have those who own a bass musical instrument or love music. -The bass active circuit is made of excellent material, durable, and not easy to damage after long-term use. -The workmanship of this product is perfect, and you will have a good user experience. Package list: 1 Preamp Wiring Circuit