• Humbucker pickup for acoustic guitar with 89 mm soundhole • Alnico 5 magnets that provide a clear and sensitive string response • Excellent bass and midrange response, thick and full sound • Passive pickup, does not require battery or preamp • Mounting clamps with foam rubber-covered slots to protect the guitar • Real solid maple wood cover • 6.5 mm (1/4 inch) OSJ jack included, no-drill installation • String spacing: 10 mm x 5 = 50 mm • Dimensions: 110 × 30 × 20 mm, length under the top: 77.5 mm • DC Resistance: 8.4K, tolerance: 0.5K • Ceramic magnets, formvar coil, double inline adjustable pole pieces • Package includes: 1 pickup with OSJ jack and clip