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.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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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

Product ID: 37142073

💾Built-in data logging & USB export

📊Real-time 1/1 & 1/3 octave band analysis

🔋Rechargeable & portable with rugged design

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VT720649

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Hear every detail, own every decibel.

SEAMLESS DATA COMMAND - Integrated logger plus USB interface means effortless data capture, transfer, and compliance reporting.
FIELD READY DURABILITY - Lightweight, rugged design with rechargeable battery and tripod mount keeps you mobile and mission-ready.
PRECISION ACOUSTIC MASTERY - Capture sound with ±0.5% accuracy across full and 1/3 octave bands for professional-grade insights.
USER CENTRIC DISPLAY CONTROLS - Large 3.5" color backlit LCD with intuitive menus ensures smooth operation even in dim environments.
ANSI IEC CERTIFIED RELIABILITY - Meets strict ANSI S1.11 and IEC 61260 standards—trusted by engineers and noise pros worldwide.

The Extech 407790A is a professional-grade real-time octave band analyzer featuring 1/1 and 1/3 octave filters, a large backlit LCD, built-in data logging, and USB connectivity. Designed to meet ANSI and IEC standards, it delivers precise sound measurements with ±0.5% accuracy. Portable and rugged, it includes rechargeable battery options and accessories for field and lab use, making it an essential tool for acousticians, engineers, and noise compliance professionals.

Specifications

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

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