This instrument is mainly used for environmental noise measurement, noise suppression engineering monitoring, quality control, health protection monitoring, etc. Widely used in factories, offices, audio-visual venues, transportation roads, homes, engineering construction and other places that require noise monitoring and control.<br> Features:<br> 1. Large digital LCD display, clear numerical values, easy to read.<br> 2. It is easy to operate and does not require any settings. It can be used immediately upon startup.<br> 3. Measurement range is 30 ~ 130dB. With upper and lower limit alarms.<br> 4. The adjustable range of alarm time is 5~120 seconds (factory default of 120 seconds).<br> 5. Alarm sound output function. Buzzing to remind you when the real time measurement is reach to the alarm level, and hold the data for 5s then back to normal mode.<br> 6. With hanging holes, can be hangged on the wall.<br> 7. Suitable for checking and monitoring the sound level for personal, families, business, studies, industrial, etc.<br> Specifications:<br> 1. Measurement Range: 30-130dB<br> 2. Frequency Response Range: 31.5Hz~8.5KHz<br> 3. Frequency Weighting: A weighting<br> 4. Response Speed: 8 times/second<br> 5. Accuracy: u00B1 1.5dB (with sound calibrator 94dB 1000Hz)<br> 6. Resolution: 100dB: 1dB<br> 7. Power Supply Method: DC5V 1A<br> 8. Power Supply Port Style: Type-C<br> 9. Working Temperature: 0-40 u2103<br> 10. Working Humidity: 10%~80% RH<br> 11. Storage Temperature: -10~60 u2103<br> 12. Storage Humidity: 10%~70% RH<br> Material: ABS<br> Item Size: 22.5 * 12.5 * 3 cm / 8.86 * 4.92 * 1.18 inch<br> Item Weight: 440g / 15.52oz<br> Package Size: 24.5 * 16.9 * 3.5 cm / 9.64 * 6.65 * 1.38 inch<br> Package Weight: 600g / 21.16oz<br> Package List:<br> 1 * Noise Meter<br> 1 * Type-C Power Cable<br> 1 * User Manual (English)