You are going to need a cable to connect your electrode to your powerbox.
If you already have one or you know what you are doing then great
Monopole electrodes are a single contact, and will need a second point of contact for any current and thus sensation to flow. Depending on the sockets on the second contact point you will either need a 4mm Cable (two 4mm sockets) or a BiCable which has a 4mm and a 2mm sockets.
If you are connecting to a non E-Stim Systems box then have a look at the Cables and Adapters section as we should have the right cable or adaptor for you - but there are quite a few variations possible so if in doubt please ask.
