What is the P.E.N.S. device? P.E.N.S. stands for percutaneous electrical nerve stimulation. This neurostimulation device is a type of transcutaneous electrical nerve stimulation (T.E.N.S.) that is delivered through the skin using thin needles instead of adhesive pads. Who can benefit from P.E.N.S.? There are many who can benefit from P.E.N.S.