Item Type: LED Decibel Meter_x000D_ Material: ABS_x000D_ Display Method: LED Screen_x000D_ Atmospheric Pressure: 12.5PSI to 15.4PSI_x000D_ Sampling Time: 1.5S_x000D_ Detection Temperature Range: 14 to 122_x000D_ Storage Temperature: 14 to 140_x000D_ Working Environment Storage Humidity: 20%-85%_x000D_ Detection Humidity Range: 20% to 85% (Accuracy: 5%)_x000D_ Charging: 1000mA 5V DC_x000D_ Battery: 1 x 2000mAh (Built in)_x000D_ Unit: dBA_x000D_ Measuring Range: 30-130 dBA_x000D_ Accurate: 1.5dBA_x000D_ Frequency Range: 50Hz to 8.5kHz_x000D_ Frequency Weighting: A_x000D_ Screen Display: 0.1 dBA_x000D_ Noise Meter Level (Unit: dB):_x000D_ Green 1: 55.0 or less_x000D_ Green 2: 65.0 to 55.0_x000D_ Orange 1: 75.0 to 65.0_x000D_ Orange 2: 85.0 to 75.0_x000D_ Red 1: 95.0 to 85.0_x000D_ Red 2: Above 95.0_x000D_ Grade of Temperature Smiling Face (Unit: ):_x000D_ Green: 68-86_x000D_ Orange: Below 68_x000D_ Red: Above 86