Voltage:Â 110V Temperature Accuracy:Â Ambient + 9oF to 482oF (ambient + 5oC to 250 oC) End Vacuum:Â Better than 29.9 inHg / 500 mTorr / 0.7 mbar Door Gasket Material:Â Silicone (optional Viton) Interior Volume:Â 1.9 cu ft (53 L) Nominal Power:Â 1.5 kW Nominal Voltage:Â 115V +/- 10%, 50-60Hz, 1-phase (optional 230V) Nominal Current:Â 15A (115V)