Laser Infrared Thermometer Can measure temperatures from a distance without making physical contact with the surface. Use this unit to measure the temperature of heating and air conditioners, hot engine parts, hot water pipes, cooking surface, electrical connections, hot tubes and insulation, electric motors, etc. Features: Temperature display in ºC or ºF Repeatability: 1% of reading Response time: 500ms, 95% response Spectral response: 8~14?m Emissivity: 0.95 default Distance to spot size: 12:1 Operating temperature: 0 to 40C (32 to 104F) Operating humidity: 10-95%Rh Storage temperature: -20 to 60C (-4 to 140F) Power: 9V 6F22 battery Weight: 147.5 gr (5.2 oz) Size: 16.5x11x5 cm (6.54.32 in) Uses 9Volt battery