Perhatian sebelum menggunakan Alat Pengukur Bunyi Desibel Penguji 30-130dBA ST9604:
Please don't store it at high temperature or humidity, high concentration salt or sulfur environment.
If don't use it for a long time, please take off the battery to prevent leakage of battery.
Sila benarkan perbezaan 1-3cm kerana pengukuran manual.
