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