Thermometer and Hygrometer for Indoor And Outdoor Use Weather Meter Thermometer and Hygrometer for Indoor And Outdoor Use Weather Meter Dimensions: 12.5 * 12.5 * 3.5 cm /Weight: 250G Temperature measuring range: -30 to 50 C /Humidity measuring range: 10% --190%RH Temperature measuring accuracy: &lt; 1 C(10 to 30 C), &lt;= 2 C(other) Humidity measuring accuracy: &lt;= 5%RH (40% to 75%), &lt;= 7%RH (25% to 40%), &lt;= 9RH (other)