EXTECH HD500 - PSYCHROMETER with 30:1 Infrared ThermometerHumidity, Type K Thermometer and 30:1 InfraRed Thermometer Features a built-in InfraRed Thermometer for non-contact temperature measurement. It sports a large triple LCD backlit display and a built-in USB port.It also features Min/Max, Data hold and Auto power off functions.Features of EXTEC..