CTX30 Input Voltage/Current Max: 24VAC, 42VDC, 15A Resistance Max: 10kΩ (for continuity testing) Power 9V Batteries for Toner and Probe (not included) Dimensions Toner: 2.63 x 2.75 x 1.12” (66.8 x 69.8 x 28.4mm) Probe: 8.5 x 2 x 1.4” (216 x 51 x 36mm) Weight Toner: 3.2oz (91g) Probe: 3.2oz (91g)