Model (optional): 1dB, 2dB, 3dB, 5dB, 6dB, 10dB, 15dB, 20dB, 25dB, 30dB, 40dB, 50dB. Tolerance: 1-10dB ±0.5dB, 15-30dB ±1dB. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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