Our K-fit Kegel Toner for Women comes with a probe that attaches directly to the toning unit without a separate connecting wire. All replacement probes are sold with universal 2.5 mm pin attachments. That way, no matter what device you own, you will be able to connect it to your unit. Your K-fit Kegel toning unit comes with two long connecting wires that are used to attach replacement probes and other optional accessories. If you misplace these wires, they are available for purchase on our website.