Dimensions 48*28.5*15mm (measurement has a small error) LCD size: 35.7*16.6mm (measurement has a small error) Humidity measurement range from 10% to 99% Humidity display resolution 1% Humidity sampling period 10 seconds (1 minute) Humidity measurement accuracy 5% Temperature measurement range -50 to 70 degrees Celsius Temperature measurement accuracy 1 degree (under normal temperature) MINI SIMPLE DESIGN: Thanks to its mini body and square shape, the device can be placed inconspicuously anywhere. With the most simple appearance and very practical function. Don't need an operation to read the display very easily. WIDE USAGE: You can use it in home, office, car, school, hotel, laboratory, kindergarten, aquaculture, instrument workshop, library, factory, greenhouse, basement, garage, garden shed, box for 3D printer filament and places equipped with air -conditioning, etc. INDOOR HUMIDITY MONITORING: Help you measure Indoor humidity and temperature in time, help to adjust the humidifier, dehumidifier settings, and humidistas, great for monitoring familys living conditions and health by preventing colds, dry skin, asthma, mold. WHAT YOU GET: 2*Digital Hygrometer Thermometer, Each device included two LR44 or AG13 button batteries. Please replace the battery when the display dims.