... Level Meter Decibel Logger Tester ,Noise MeterModel:GM13561,Digital Display with Dynamic Graph 2,Auto / Manual Range 3,Max Hold, ... reading*PWM output*Calenda*4700 data store*USB computer interface*Analysis software*Overload indication: OVER / UNDER*Automatic backlight*Low battery indication* ... USB cable•1 x CD driverNote:This product is certified with CE, FCC and RoHS. 30-130dB Digital Sound Level ...