Feature: 1. Volume control2. Bass, mid and treble control knobs3. Built-in tuner with LED display4. 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:Fishmanand39;s lsys onboard preamplifier system strives to provideSmall footprint for maximum value. Three models are available,These preamp systems feature volume, tone shaping, and phase controls; pre-wired Fishmanpickups and low profile control knobs.Also includes a low battery indicator and a separate battery compartment.Fishman lsysand FeaturesSmall 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.