TestHelper SW-525A Sound Level Meter Tester 30-130db Large Screen Red LCD Display Wall Hanging Type Decibel Noise Measuring with Alarm (Sound Level Meter) sold2024 Some wire function may be

Some wire function may be different Please read carefully your Radio install guide or ask an installer

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TestHelper SW-525A Sound Level Meter Tester 30-130db Large Screen Red LCD Display Wall Hanging Type Decibel Noise Measuring with Alarm (Sound Level Meter) sold2024 Some wire function may beTestHelper SW 525A Sound Level Meter Tester 30 130db Large Screen Red LCD Display Wall Hanging Type Decibel Noise Measuring with Alarm (Sound Level Meter) Purchase instructions: 1. The product is powered by USB cable, please confirm before purchase, you have USB socket applicable Product has no battery, it uses AC power supply 2. Usually in a very quiet room, the value will not be lower than 40dB, which is normal. Description: Large digital LCD