Simultaneously monitors both temperature and humidity on a large 3/4" digital display. For desiccators, incubators, refrigerators, fume hoods, labs, stock rooms, clean rooms, chemical storage areas, warehouses, greenhouses and outdoors. Recalls min/max temperature and min/max humidity readings over any time period. Stand or wall mount. Comes with 2 AAA batteries which last a full year. Temperature range: 0°/50°C & 32°/122°F in 1°C or F resolution with accuracy of ± 1°C, 2°F (at 32° to 104°F). Humidity range; 25% to 95% RH in 1% RH resolution with accuracy of ± 5% RH (at 59°F to 104°F). Measures 3 3/4" x 2 1/2" x 1/2".