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Sound Level Meter-Lutron Make, Model:SL4030
FEATURES
* Main specification meet
IEC 651 type 2.
* A, C weighting.
* Max. hold.
* Fast/slow time weighting.
AC/DC output.
* Range :
3 ranges, 30 to 130 dB.
* Mini pocket size.
* DC 9V battery ( 006P ) or
DC 9V adapter in