Seymour Duncan Wavelength Volume & Tone

Seymour Duncan Wavelength Volume & Tone, Volume & Tone Module, For acoustic guitars with Wavelength Under-Saddle Transducer, Can be used with Wavelength Solo endpin preamplifier (not compatible with Wavelength Duo), For attachment to the inside of the sound hole, Controls for volume and tone, Two-wire connection cable with 3.5 mm jack plug ...