AcuRite 02084M Non-Contact Digital Infrared Thermometer Digital infrared thermometer gun measures in Fahrenheit or Celsius (-58F to 999F; -50C to 550C) Distance to Spot Ratio: 12:1; Emissivity: 0.95 (fixed) Built-in laser temperature gun sight for precise aiming; No-slip grip designed to fit comfortably in hand Hold function displays highest and lowest temperatures recorded Backlit infrared thermometer display with automatic shut off; Powered by one 9-volt battery (included)