Our Non-Contact Voltage Detector w/ Laser Infrared Thermometer is specifically designed for residential and commercial HVAC applications. The Voltage Detector provides visual and audible indicators to detect AC voltage between 12 and 1000V and has an industry leading safety rating of CAT IV 1000V. With a temperature detection range from -22 degrees to 482 degrees F, users can identify the correct thermometer reading in all applicable HVAC settings. The LCD backlit display provides a clear and accurate temperature reading when used in applications.