Laser Infrared Thermometer Peralng -58~716 Non-contact Digital LCD Display Handheld Conversion Accurate Temperature Gun Take accurate temperature readings with this handheld gun. Back light makes for easy temperature readings. HIGH AND LOW TEMPERATURE ALARMS can be set to provide audible feedback when a target temperature is exceeded. Use this handy feature to easily detect when a specific temperature is reached or exceeded. Auto Shut-off & Data Hold Function & Low Battery Indicator & Backlight Display Selection. Also includes convenient LOCK FEATURE for continuous hands-free measurements. This allows you to set up the thermometer to continuously monitor an area without pressing the trigger button. The Lock feature is particularly useful when combined with the audible High or Low alarm. Measures in Celsius or Fahrenheit (Range: -58~716 / -50 to +380). Measurement error is1.50-25/3.