Size: 370 mm x 40 mm x 18 mm Cable length: 87 mm Color: As shown It applies tofolk,classical guitarandukuleleand so on. Postedin different parts ofthe instrumenthave differentpickup effect. Directly bonded to theinstrumentpanel, 3Mdurableplastic, not to hurtthe piano, It can beremoved at any time, and then pasteuse. Without power,easy to install, cheap,pickupeffect class!