Features: <br>1. Professional sensor for excellent sensitivity and precision <br>2. The quality of the sound can be measured in various environments without contact, and the test results can be displayed quickly and accurately. <br>3. High-intensity backlight screen display for easy reading at dim environment. <br>4. With automatic shutdown function, automatic shutdown after 3 minutes without operation, energy saving and environmental protection <br>5. Widely used in automotive noise testing, industrial equipment noise testing, home noise testing, etc. <br> <br>Specification: <br>Condition: 100% Brand New <br>Brand: SMART SENSOR <br>Model: AS804 <br>Accuracy: 1.5dB <br>Frequency Range: 31.5Hz to 8.5Hz <br>Measuring Level: 30-130dBA <br>Resolution: 0.1dB <br>Over Range: LCD show Over <br>Time weighting: Fast <br>Max: Maximum hold <br>Min: Minimum hold <br>Power Supply: 3 * AAA 1.5V alkaline cells(not included) <br>Microphone: 1/2 inch Electret Condenser microphone <br>Operating Temperature: 0-40℃ <br>Operating Humidity: 10%-80%RH <br>Storage Temperature: -10-60℃ <br>Storage Humidity: 10%-70%RH <br>Weight: Approx. 111g / 3.9oz <br>Size: Approx. 155 * 50 * 25mm / 6.1 * 2.0 * 1.0in <br> <br>Package List: <br>1 * Digital Sound Level Meter<br>1、Professional sensor for excellent sensitivity and precision <br>2、The quality of the sound can be measured in various environments without contact, and the test results can be displayed quickly and accurately. <br>3、High-intensity backlight screen display for easy reading at dim environment. <br>4、With automatic shutdown function, automatic shutdown after 3 minutes without operation, energy saving and environmental protection <br>5、Widely used in automotive noise testing, industrial equipment noise testing, home noise testing, etc.