TG64-2 Measures surface temperatures from safe distance using infrared technology with a 30:1 laser spot ration The included Type K thermocouple allows contact temperature readings in addition to non-contact capabilities 30:1 spot ratio to measure a smaller target from a safer distance. 9V battery offers 8 hours of continuous run time (included) Built to withstand a drop of 3 m (9.8 ft) and IP65 rated for reliable performance in demanding industrial applications.