Power Source AC 220V, 50-60Hz (Optional: AC 110V, 50-60Hz) Heated Plate 150W Thermal Cut Off 95�±6oC Display Three digit, 0.56 inch, 7 segment Led Temperature Monitoring 0-75oC Max-temperature of Heated Plate 85oC Heated Wire AC 22V 60W, 50-60Hz Power Rate 220W Alarm Yes Temperature Control Setting Invasive Mode:Chamber outlet: 35.5-37oC, Airway: 35-40oC Non-invasive Mode:Chamber outlet: 31oC, Airway: 28-34oC Range 10-70oC, Accuracy: ±2oC (In 25-45oC temperature range)