Product Description: Humbucking, warm and powerful sound, low noise
Neodymium magnets provide excellent balance between strings and clear acoustic sound
Designed to match guitar, passive circuit, no battery required
Easy installation with no modification required. Plug and play right out of the box
Can be installed in small sound holes up to 3-7⁄8" (98.5mm) in diameter
Product Specifications: Model: PRO-NEO-D02
Material: Neodymium magnet
Type: Passive Humbucker