Easy Install: Set the "live" wire to the pickup selector and the ground wire to any piece of the tone and or volumes. High Output: Ceramic magnet,vacuum wax potted and sealed,Comes with 2 connecting wires.With strong magnification. Package: Mounting screws are included in package,and all the are packed into a box. bass pickups in silver with Black frame.Great use for 4 string bass guitar. Great Sound: This pickup has full tone color,stable effect,keeps sound.