class 2, auto range, economical SOUND LEVEL METER Model : SL-3113B * Meet IEC61672 class 2 * Auto range : 30 to 130 dB. * Manual range : 3 ranges กก30 to 80 dB, 50 to 100 dB, 80 to 130 dB . * A/C frequency weighting. * Fast/slow time weighting. * Peak hold, Data hold. * Record (Max., Min.). * DC 9V battery (006 P). * Optional wind shield ball, SB-01.
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