“The E-Stim 4 mm Cable is designed for connecting any of the E-Stim Systems Control units to electrodes with 4 mm sockets, such as E-Stim’s Insertable Range.If you are looking to connect to electrodes such as self-adhesive conductive pads then you will need a 2mm / TENS cable.Available at Mister B, this E-Stim cable will also work with control units from ErosTek, Folsom and PES.If you have a power box or a TEN’s unit from another brand, check out the E-Stim adapters that we carry.1.5 m longWith 3.5 mm jack socket on one end, With two colour coded 4 mm banana plugs on the other”