Whether you're monitoring installing audio, workplace machinery or alarm systems, or handling product noise certification and reduction, the Portable Sound Level Meter gets the job done. Data Hold to freeze reading on digital display. This Digital Sound Level Meter is designed to meet the measurement requirements of Safety Engineers, Health, Industrial safety offices and quality control in various environments. Ideal for noise surveys in the installing fire alarms, workplace and speaker systems and enforcing noise ordnances. It is perfect for sound system testing, speaker system measurement and environmental noise level monitoring.