The Extech 392052 is a Flat Surface Stem Dial Thermometer with a temperature range of -50°C to 300°C ±2°C (-58°F to 572°F ±2°F). Ideal for measuring high temperatures on motors and other flat surfaces. The thermometer features a 12.7 cm (5 in) stainless steel shaft with a 5.1 cm (2 in) dial, an on/off switch, and auto power off function after one hour. Product includes 1.5 V battery button.