Household Indoor Mini Smiley Electronic Temperature And Humidity Meter With Stand 1. Operation method: in the off state, long press 1.5 seconds to turn on the machine; in the on state, double-click the button to switch the temperature unit; in the on state, long press 1.5 seconds to turn off the machine 2. Function: can be used to measure temperature, measure humidity 3. English + expression dual display, clear at a glance 4. Placement: can be placedhanging; with double-sided adhesive stickers, removable bracket 5. Three air vents ventilation design, round hole ventilation holes, accelerate the induction speed 6. Removable bracket design, disassemble and install at will Parameters: 1. Material: ABS 2. Function: indoor temperature and humidity, comfort level display, switchable temperature units 3. Temperature measurement range: -20-60 degrees celsius (-4-140 degrees fahrenheit) 4. Temperature measurement accuracy: error of about 1 degrees celsius (1.8 degrees fahrenheit) 5. Temperature resolution: 0.1 degree celsius (0.2 degree fahrenheit) 6. Humidity range: 10-99 percent RH 7. Humidity measurement accuracy: error of about 5 percent RH 8. Humidity resolution: 1 percent 9. Battery: 3V CR2032 button battery 10. Size: 50 x 35 x 13mm, display size: 38 x 23mm 11. Weight: 21g