TM-102
EN-5
SLOW
：
for checking average level of fluctuation
noise.
7 HOLD button.
The reading data shown on LCD can be locked
while pressing the button.
8 Backlight button.
Press the button you enable the display backlight
to easy readings in dark environments. Press
more than 1 second to disable backlight, which
however it automatically OFF after 15 seconds.
9 Microphone
1/2 inch Electret Condenser microphone.
10 Battery cover
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