Item Type: Wall Mounted Sound Level Meter <br>Material: ABS <br>Display Method: LED Screen <br>Atmospheric Pressure: 12.5 PSI- 15.4 PSI <br>Sampling Time: 1.5 S <br>Detection Temperature Range: -10℃-50℃ <br>Storage Temperature: -10℃-60℃ <br>Operating Environment, Storage Humidity: 20%-85% <br>Detection Humidity Range: 20%-85% (Accuracy: 5%) <br>Charging: 1000 mA 5V DC <br>Battery : 1 x 18650 2000mAh (shipped with built in battery) <br>Unit: dBA <br>Measurement Range: 30-130dBA <br>Accuracy: ±1.5dBA <br>Frequency Range: 50Hz-8.5kHz <br>Frequency Weighting: A <br>Screen Display: 0.1 dBA <br>Sound Meter Level (Unit dB): <br>Green 1: 55.0 or less <br>Green 2: 65.0-55.0 <br>Orange1: 75.0-65.0 <br>Orange2: 85.0-75.0 <br>Red1: 95.0-85.0 <br>Red 2: 95.0 or more <br>Temperature Rating (unit ℃): <br>Green: 20-30 <br>Orange: Below 20 <br>Red: Above 30<br>1、4 IN 1 DECIBEL METER: This decibel meter has multiple functions, having a decibel meter is equivalent to having a thermometer, hygrometer and clock at the same time. <br>2、11IN DISPLAY SCREEN: This large screen decibel meter has an 11 inch LED display with adjustable brightness for a clear, easy to use display. <br>3、HIGH ACCURACY: The sound level meter uses an intelligent air semiconductor sensor to test decibel temperature and humidity values, making it more sensitive, accurate and stable. <br>4、WIDE APPLICATION: The sound level meter can be applied to noise engineering, product quality control, health prevention and treatment, etc. <br>5、USB CHARGING: This decibel meter has a built in 2000mAh lithium battery power supply with a 10ft USB charging cable so you can charge it anywhere.1 x Wall Mounted Sound Level Meter<p>1 x Instruction</p><p>1 x USB Cable</p><p>1 x Installation Sticker</p><p>2 x Screw</p><p>2 x Expansion Tube</p>