Feature: 1. Volume control 2. Bass, mid and treble control knobs 3. Built-in tuner with LED display 4. This onboard preamplifier system has been designed and manufactured to provide maximum control, performance and quality in a small, unobtrusive form factor. The compact and sophisticated system features volume, bass, mid and treble controls, a phase switch and a built-in tuner with LED display. Specification: Fishman& 39;s lsys onboard preamplifier system strives to provide Small footprint for maximum value. Three models are available, These preamp systems feature volume, tone shaping, and phase controls; pre-wired Fishman pickups and low profile control knobs. Also includes a low battery indicator and a separate battery compartment. Fishman lsys+ Features Small footprint fits many guitars. volume control. EQ tone shaping control. Phase switch. Low battery indicator. Pre-wired Fishman Sonicore pickups for easy solderless installation. Low profile control knob. Easy-to-read 7-segment LED tuner onboard. Bass and treble controls enhance tone shaping. Package: 1 * Pickup Notes: 1. Due to manual measurement, please allow a difference of 0.5-1 inches (1 inch = 2.54cm) 2. Due to the different computer screens, the color of the actual product may be slightly different from the product picture. 3. Thank you for your understanding.