There have been several different versions of this hand control; some had “up & down” labels, some had “fwd and back”, but as long as your hand control has this shape, and the buttons are in these approximate positions, it will be the correct one (we always ship the most current version). The hand control has a round plug with eight pins, and it plugs into our part #5220 control box under the chair (some folks think that the cord coming out of the back of the chair that plugs into the transformer is the hand control cord, but it’s not; the hand control plugs into the control box, and then there’s a different cord that goes to the transformer).