This Neo-D is an affordable alternative to the award winning Rare Earth pickup boasts the same neodymium magnet structure for great string balance and sparkling acoustic clarity. The single coil version gives you bright shimmering tone and quality. The Neo-Ds low profile and high-impedance design means it needs no battery to operate.It is available in single coil and humbucking models. To read more about the Fishman Neo-D Passive Soundhole Pickup please download the user guide using the button below. Features/Specifications 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 Length:103mm Width:24mm Depth: 20mm