1. Measuring range: 35 to 135dB
2. Accuracy: ±2.0dB
3. Voice activation (“Quiet Please”) or siren options
4. Automatically or manually adjustable lights
(Green-Yellow-Red )
5. Self-standing or wall-mountable
6. Powered by AC adapteror 6*AA batteries
7. Application: schools, hospitals, temples, library, etc can benefit from a polite reminder for people to keep the noise at an
acceptable level.