1
2
3
HOLD MAX dBA
N
MIN
dBC
9
Fast Slow
4
8
FAST
SLOW
5
7
+
6
SM-10
Windscreen
Microphone
LCD display
Frequency weighting select button
Maximum/Minimum Hold button
Power button
Backlight button
Time weighting select button
Data Hold button
Record button
1
2
3
HOLD MAX dBA
N
MIN
dBC
Fast Slow
4
FAST
5
SLOW
+
6
REC
SM-20-A
3
9
8
7
10