"See the heat - extend the limits of the human eye by translating invisible thermal energy into dynamic color images; AT HOME - Expose hidden problems and reduce energy bills; AT WORK - Measure temperature and find electrical faults. Thermal imaging cameras help identify hot and cold spots in the home, indicating where insulation is missing and where air leaks occur. Temperature range: -20C-+550C, -4F to 1022F. Resolution 256x192.