Handheld Digital Sound Level Meter 30~130dB — Professional Sonometer Noise Tester with Communication & Fast Response

Portable digital sound level meter (30~130dB) for noise engineering, quality control, film sets, construction site checks, vehicle noise measurement and home/school health protection. Handheld decibel detector delivers stable, reliable and precise readings with a fast response speed for field and on-site testing. To enable the communication function: power on the instrument, then press and hold the button; an on-screen indicator will appear confirming communication is active. Measurement modes: A-weighting — simulates the human ear’s frequency response for low-intensity sounds below 55 decibels and is used to measure steady-state noise, with the displayed value representing the effective (RMS) level. C-weighting — simulates frequency characteristics of high-intensity mechanical noise and is suitable for fluctuating or unstable transportation noise.