Features With a Large LCD screen: easy to read the temperature and humidity of your room at a glance. Very precise: this thermometer is accurate enough to create readings within 1 degree and humidity is within 5%. Compact design: small and light enough for saving space and carrying around. Mini size also perfect to use in incubators, brooders, cigar humidors, reptile tank. It can help you adjust the humidifier, dehumidifier settings and humidistat, great for monitoring family's living conditions and health by preventing colds, dry skin, asthma, allergy, mold. Features: With a Large LCD screen: easy to read the temperature and humidity of your room at a glance. Very precise: this thermometer is accurate enough to create readings within 1 degree and humidity is within 5%. Compact design: small and light enough for saving space and carrying around. It can help you adjust the humidifier, dehumidifier settings and humidistat, great for monitoring family's living conditions and health by preventing colds, dry skin, asthma, allergy, mold. Mini size also perfect to use in incubators, brooders, cigar humidors, reptile tank. Specification: Weight: Approx.22g/ 0.8oz Size: Approx.48 * 28.6 * 15.2mm/ 1.9 * 1.1 * 0.6in Color: Black/ White (Optional) Humidity Range: 10%~ 99% Temperature Range: -50℃~70℃ Sampling Period: 10s Humidity Accuracy: ±5% Temperature Accuracy: ±1℃ Operating voltage: 1.5V Battery Type: 2 * AG13 Button Battery (Included) Package List: 1 * Humidity Thermometer Note: Please allow slight measuring deviation due to manual measurement. How to install the batteries: Step1: turn over the thermometer, push the battery cover as the arrow direction. Step2: Put 2 AG13 button batteries into the container, then close the cover. Package List