The Matrix Infinity pickup and pre-amp system from Fishman offers you a super clear, transparent sound with dynamic string response and not mention – very easy installation in your guitar! The volume and tone controls are soundhole mounted for easy accessibility, and there is even an integrated LED low battery indicator for knowing when you’ve got to change them out. This pickup is the narrow format for 3/32? (2.3 mm) saddle slot widths. This pickup was previously installed into a guitar, however still works and is being sold as an open-box item at a great price.