functions as an on/off "in line" battery toggle switch for #Mcd473 - #Mcd479 On-Board Glow Driver units
Functions as an on/off "in line" battery switch for #473 thru #480 On-Board Glow Driver units
Functions as an on/off "in line" battery toggle switch for #Mcd471 & #Mcd472 On-Board Glow Driver units.