Packaging Size 24.5 x 11 x 12.5 cm Measuring Range 0-1.999 Power Supply Li-ion Battery 3.7V , 5000 mAh Measured Quantity Of Formaldehyde Range 1,999 mg Measured Quantity Of Formaldehyde Resolution 0.001 mg Measured Quantity Of Formaldehyde Accuracy 5 Percent Measured TVOC Range 9,999 mg Measured TVOC Resolution 0.001 mg Measured TVOC Accuracy 10 Percent Measured Variable Range 999 ug Measured Variable Resolution 1 ug Measured Variable Accuracy 15 Percent Measured Variable Temperature Range 45 Degree Celsius ( Only Display In Degree Celsius ) Measured Variable Temperature Resolution 0.1 Degree Celsius ( Only Display In Degree Celsius ) Measured Variable Temperature Accuracy 1 Degree Celsius ( Only Display In Degree Celsius ) Measured Variable Air Humidity Range 99 Percent rh Measured Variable Air Humidity Resolution 1 Percent rh Measured Variable Air Humidity Accuracy 5 rf Display LCD display Charging Socket Micro USB Operating Conditions 50 Degree Celsius, Max. 90 Percent rh Storage Conditions 50 Degree Celsius Max. 90 Percent rh Dimensions 24.5 x 11 x 12.5 cm Weight About 515 g