Decibel Meter 30 To 130db Wall Mounted Sound Level Reader 11 Inch LED Time Temperature Humidity Noise Meter Item Type: Decibel Meter Material: ABS Display method: LED screen Atmospheric Pressure: 12.5PSI to 15.4PSI Sampling Time: 0.3S Detection Temperature Range: 14℉ to 122℉ Storage Temperature: 14℉ to 140℉ Working Environment Storage Humidity: 10%-80% Detection Humidity Range: 20% to 85% (Accuracy: 5%) Charging: 1000mA 5V DC Battery: 1 x 18650 2000mAh (Built in) Unit: dBA Measuring Range: 30-130 dBA Accurate: ±1.5dBA Frequency Range: 50Hz to 8.5kHz Frequency Weighting: A Screen Display: 0.1 dBA Noise Meter Level (Unit: dB): Green 1: 55.0 or less Green 2: 65.0 to 55.0 Orange 1: 75.0 to 65.0 Orange 2: 85.0 to 75.0 Red 1: 95.0 to 85.0 Red 2: Above 95.0 Grade of Temperature Smiling Face (Unit: ℉): Green: 68-86 Orange: Below 68 Red: Above 86