Features With LCD Screen: The humidity thermometer is easy to read the temperature and humidity of your room at a glance. Very Precise: The thermometer is accurate enough to create readings within 1 degree and humidity is within 5%. Compact Design: The humidity thermometer is small and light enough for saving space and carrying around. Function: Mini size also perfect to use in incubators, brooders, cigar humidors, reptile tank. Wide Applications: The thermometer 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. 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