Uses infrared sensors to measure surface temperatures. It performs within the ranges as specified for home repair use and should not be used to check the temperature of living beings Helps homeowners track down power-draining drafts Sold with a 5-step guide to fixing basic energy leaks and comes with the thermal leak detector Plugging leaks can save up to 20 percent on heating and cooling costs. Plastic housing with ergonomically formed grip for ease of use Allows you to make your home more comfortable and energy efficient, Weight: 0.65 pounds, Manufacturer: BLAUG