To start saving on energy costs, use this Ryobi Non-Contact Infrared Thermometer to detect hot and cold spots near doors and windows and check air vents for efficiency. The thermometer's laser guide makes it easy to take temperature readings by clearly identifying the current target. The small hand-held size of the thermometer allows for great portability between jobs, so you can check the energy efficiency of your household and then easily transition to checking the temperatures of engine components.