Digital Humidity and Temperature Meter, GoerTek Thermometer Hygrometer monitor for Indoor and Outdoor, Min/Max Hold, Hand-held LCD Backlight with one 9V Battery Included Hand-held Digital Humidity & Temperature Meter ; Humidity Range :5%~98%RH ;Temperature Range : -30~70/-22~158 ; Fast Response Time , High Accuracy and Performance ; ABS Plastic, Dust & Splash Proof, Durable and Useful ; Dual Display Temperature & Humidity ; LCD Backlight ; Max/Min Data Hold Function ; Selectable Temperature Unit (/) ; Auto Power Off ; Power Supply by one 9V Battery (Included) ;