Each DS2A, DS3 and Ds4 isolated stimulator is supplied with a pair of touchproof 2mm plugs which are used to connect the stimulator output sockets to electrode leads. Additional sets of two plugs (one red, one black) may be ordered from Digitimer using the part code NL985P.  Note that these plugs are also compatible with the stimulator input sockets on the NL100C Stimulus Control module, supplied as part of the NL100RK and also with the output connectors of the NL120S Audio Amplifier.