PORTER-CABLE Bare-Tool PCC581B 18-Volt Infrared Thermometer (Tool Only, No Battery) Infrared thermometer for non-contact surface temperature measurements shows energy leaks or hot spots LEDs change color to show temperature differences - blue shows spots cooler and red shows spots warmer than the reference temperature by more than the threshold Three temperature threshold settings - 1, 5, 10-Degree for quickly detecting different temperature changes 12:1spot ratio for more accurate readings Accurately measures temperatures from -22F to 590F allowing for use in a greater number of applications