Wall-Mounted LCD Sound Level Meter - Digital Decibel Monitor 30 ~ 130dB (Accurate Measurement)

Wall-mountable digital sound level meter featuring a large LCD that displays clear numeric values for easy reading. The unit is plug-and-play and requires no setup — it is ready to use immediately after powering on. Measurement range: 30 ~ 130dB, with selectable upper and lower limit alarms. The alarm duration is adjustable from 5~120 seconds (factory default of 120 seconds). When the live reading crosses a set threshold the meter emits an audible buzzer and locks the displayed value for 5s, then returns to normal measurement mode.