Display function: 60°C on green light 1, 70°C on green light 2, 80°C on green light 3, 90°C on green light 4, 100°C on green light 5, 110°C on green light 6, 120°C on green light 7; 130°C-140°C Yellow light 1, 150°C yellow light 2, 160°C yellow light 3, 170°C-180°C yellow light 4, 190°C yellow light 5, 200°C-210°C yellow light 6; 220°C light red Light 1, 230°C on red light 2, 240°C on red light 3, 250°C on red light 4, 260°C on red light 5, 270°C on red light 6, 280°C on red light 7; all lights on above 290°C .