-Neodymium magnet structure for exceptional string balance and sparkling acoustic clarity
-Low profile, high impedance design needs no battery
-Easy installation with no alteration ?plug & play right out of the box
-Excellent string-to-string balance and acoustic clarity
-Fits in soundholes as small as 3-7/8" (98.5 mm) diameter
-Humbucking model features stacked coils to eliminate noise