Klein Tools NCVT-4IR Non-Contact Voltage Tester W/ Laser Infrared Thermometer Designed specifically for HVAC applications Provides non-contact determination of AC voltage in cables, cords, circuit breakers, switches, outlets and wires, as well as AC voltage in security, entertainment, communications, and more. Detects AC voltage from 12 to 1000V with visual and audible indicators Backlit LCD display with 0.1 degree resolution Auto power-off conserves and extends battery life Screw-thread battery cap with O-ring ensures dust and water resistance 4:1 distance-to-spot ratio IR thermometer with user selectable Degrees Fahrenheit or Degrees Celcius from -22 to 482-Degree Fahrenheit (-30 to 250-Degree Celcius) Convenient laser pointer to target measurement area for temperature measurement On Sep-04-21 at 03:48:00 PDT, seller added the following information: