Check AC units, ventilation, bearings, motors and transformers for overheating, bad electrical connections and fuses 30:1 Distance to Spot Ratio Temp Range of -26 °F to 2282 °F / -32 °C à 1250°C Precision accuracy and rapid response time Laser pointer, backlit dual LCD Display Auto display hold and MAX/MIN memory Adjustable emissivity for measuring a variety of materials