Fieldpiece ATIR3 Infrared Temperature Accessory Head Measures temperature without contact 8:1 field of view Laser sight included Select Degree F or Degree C Designed for HVAC/R, the Non-contact Infrared Temperature Accessory with Laser Sight, model ATIR3, measures infrared energy in it's cone of view and converts it into temperature readings on your meter using the mVDC scale