Never used.
Digital Sound Level Meter Hand-held Sound dB Meter with Programmable Alarm Value Function, 30-130dB(A) Decibel Sound Noise Meter Tester Measurement with LCD Dispaly, Max/Min/Hold Function
Never used.
Digital Sound Level Meter Hand-held Sound dB Meter with Programmable Alarm Value Function, 30-130dB(A) Decibel Sound Noise Meter Tester Measurement with LCD Dispaly, Max/Min/Hold Function
