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, environmental control and irrigation systems Detects AC voltage with visual and audible indicators Infrared thermometer with user selectable °F/°C from -20 to 482°F (-30 to 250°C) Convenient laser pointer helps target 4:1 distance-to-spot ratio for infrared temperature 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 Lightweight, compact tool with pocket clip provides easy storage and quick access Application HVAC Display Type Digital Frequency 50 - 500 Hz Special Features High-pitched continuous beeping sound Voltage 12 - 1000V AC