No scale multipliers Multiple test voltages for spot and step voltage testing Guard terminal to eliminate surface leakage current Dual operation low voltage brushless a.c. generator or 120 V 50/60 Hz mains (line) supply Available in alternate configurations: 212159 - Low voltage brushless a.c. generator. Cranking speed between 130 rpm and 170 rpm 212459 - Six IEC LR6 cells (AA) Battery life: not less than 1300 insulation or Resistance range tests 212559 - Dual operation 120 V 50/60 Hz mains (line) supply and rechargeable battery. Six NiMh 1800 mAh cells