Wall-Mounted Decibel Meter — Professional Sound Level Monitor 30 ~ 130dB with Audible & Visual Alarm, Accurate Readings

Large digital LCD provides clear numeric readouts for quick, easy viewing. The unit is simple to operate and requires no setup—ready to use immediately on startup. It measures sound levels across a 30 ~ 130dB range and includes both upper and lower limit alarms. Alarm timing is adjustable from 5~120 seconds (factory default of 120 seconds). When a threshold is reached the device activates an audible buzzer and visual alert; the triggered measurement is held for 5s before the meter returns to normal monitoring mode.