These are the Defibtech Lifeline Adult Training Pads only. This item does not include the connector wire. These pads cannot deliver a shock and are semi-adhesive so that they can be used multiple times for training purposes. They are for use with the Defibtech Lifeline AED or Defibtech Stand Alone Trainer. The replacement pads attach to the connector wire assembly of your old adult training pads with Velcro. This item includes 5 pairs of adult training pads.