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 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 feature volume control, EQ tone shaping, phase control, pre-wired Fishman pickups, and low-profile control knobs. Includes a low battery indicator and a separate battery compartment. Fishman lsys+ Features: - Small footprint fits many guitar types - Volume control - EQ tone shaping controls - Phase switch - Low battery indicator - Pre-wired Fishman Sonicore pickups for easy solderless installation - Low-profile control knobs - Easy-to-read 7-segment LED tuner - 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 color of the actual product may vary slightly from the product image. 3. Thank you for your understanding.