Double Bass Pickup FISHMAN BP-100 Everything in the photos is included. * I used the pickup by inserting it under the bridge because it produced a louder string sound when clamped to the bridge. * The jack can be secured by inserting it between the 2nd and 3rd strings. * It produces a very clear sound quality. * I lost the clip because I didn't use it. * There was a ground wire, but it broke. I don't feel it's necessary in its current state. I am selling this because I purchased a different pickup.