Standard shielded plastic female right angle plug, 48 inch wires Pair of 2 leads to connect a total of 4 electrodes Pins fit standard 2mm pigtail electrode pad connectors Compatible with most standard TENS & EMS units including SPORT PLUS EMS/TENS Combo Unit, ZZAN602 TENS, TENS 7000, Twin Stim iii EMS NOT compatible with Empi or Prospera or SUPPENDON devices