Wall-Mounted LCD Digital Sound Level Meter — Decibel Noise Monitor 30 ~ 130dB, Accurate Measurement

Wall-mountable sound level meter with a large digital LCD for clear numeric readouts, easy to view from a distance. Plug-and-play operation requires no configuration — the device starts measuring immediately after power-up. Measurement range: 30 ~ 130dB, with both upper and lower limit alarm settings. Alarm delay is adjustable from 5~120 seconds (factory default of 120 seconds). When the real-time level reaches the preset alarm threshold the unit emits a buzzing alert, holds the triggered reading for 5s, then returns to normal monitoring mode.