Feature: 1. Built In High Sensitivity Tuner: The guitar preamplifier features a phase effect inversion function and a highly sensitive tuner for accurate tuning capabilities. 2. Simple and Compact Design: The for Presys Plus onboard preamp system is designed to provide optimal control, performance, and quality in a discreet and compact form. 3. Accurate Sound Control: The compact system includes volume, bass, mid, and treble controls, a phase switch, and a built in tuner with an LED display screen for easy tuning. 4. Convenient Installation: The guitar preamp also includes a pre wired for Sonicore pickup for no solder, plug and play installation, along with low battery indicator light, and a unique pivot design for easy access to the battery compartment. 5. Enhanced Sound Quality: The for Presys Plus preamp system is designed to deliver enhanced sound quality, ensuring clear, balanced, and dynamic tones that bring out the best in your guitar performance. Specification: Item Type: Guitar Preamp EQ Equalizer Material: ABS Battery: 6F22 Battery x 1 [Battery not included] . Package List: 1 x Equalizer 4 x Screws 3 x Accessory 1 x Strap 1 x Manual