Feature: 1. Volume control 2. Bass, mid, and treble control knobs 3. Built-in tuner with LED display 4. This onboard preamplifier system is designed to provide maximum control, performance, and sound quality in a compact, unobtrusive form factor. The system includes volume, bass, mid, and treble controls, a phase switch, and a built-in tuner with LED display. Specification: Fishman lsys onboard preamplifier system is engineered for a small footprint to maximize space efficiency. Three models are available. These preamp systems include volume control, EQ tone shaping, phase switch, pre-wired Fishman pickups, and low-profile control knobs. Also features a low battery indicator and a separate battery compartment. Fishman lsys+ Features: - Compact design fits a variety of guitars - Volume control - EQ tone shaping controls - Phase switch - Low battery indicator - Pre-wired Fishman Sonicore pickups for easy, solderless installation - Low-profile control knobs - Onboard 7-segment LED tuner for easy reading - Bass and treble controls for enhanced tone shaping Package: 1 x Pickup Notes: 1. Due to manual measurement, please allow a difference of 0.51 inch (1 inch = 2.54 cm). 2. Due to different computer screens, the actual product color may vary slightly from the image. 3. Thank you for your understanding.