What is frequency range for this device?

The SL510 has a frequency range from 31.5Hz to 8KHz.

does make 20hz to 20khz readings?

Thank you so much for your interest in our products. The 407032 model has a measurement bandwidth between 31.5Hz to 8KHz. Please check all the specifications of this meter here: http://www.extech.com/products/resources/407732_UM-en.pdf

Hello Checker,The 407760 comes with software, tripod, USB extension cable, windscreen, and 3.6-Volt Lithium battery.Best Regards

The model presented says 'Extech 407730' but in the description and image apears Extech 407732, which you are sending?

I am not sure where 407730 is appearing besides the comparison table between the different models. For simplicity, this page is for the Extech 407732. You would get the item in the pictures.

Manufacturer	Extech
Part Number	407790A
Item Weight	2.1 pounds
Product Dimensions	3.9 x 2.4 x 13.6 inches
Item model number	407790A
Batteries	4 C batteries required. (included)
Is Discontinued By Manufacturer	No
Style	Real Time Octave Band Analyzer
Item Package Quantity	1
Number Of Pieces	1
Measurement System	Metric
Measurement Accuracy	+/-.5%
Included Components	Complete with Windows compatible software, USB cable, 4 x C batteries, microphone wind screen, mini screwdriver, 120V AC adaptor, and case.
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Warranty Description	TW

Extech 407790A Real Time Octave Band Analyzer - 1/1 and 1/3 Octave Filters, Real-Time Sound Level Meter, Built-in Data Logging, Large LCD Display, USB Interface, Meets ANSI & IEC Standards

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