Y-Electrode (Large Body Electrode)Y Electrode (Large Body Electrode) When plugged into the Tennant BioModulator, the large body Y Electrode attachment provides therapy versatility to address the underlying cause of pain and inflammation without drugs or invasive medical procedures. This attachment is good for working on the back, neck, arms, legs, etc., and can be used to knead muscle and fascia in combination with the voltage. 10 long. Some users experience a subtle buzz or tingle