DC 5V Wall-Mounted Digital Sound Level Meter LCD 30~130dB — Noise Monitor with Adjustable 5~120s Alarm (factory default 120 seconds) & 5s Hold

Large digital LCD provides clear numeric readouts for accurate readings. Ready to use immediately after power-up — no configuration required for operation. Measures sound levels across a 30~130dB range and supports both upper and lower limit alarms. The alarm duration is user-adjustable from 5~120 seconds (factory default of 120 seconds). When the live measurement reaches a set alarm threshold, an audible buzzer alerts you and the reading is held for 5s before the meter returns to normal monitoring. Designed for wall mounting as a compact noise measuring instrument.