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SmartSensor AR884A Smart Wall Mounted Sound Level Meter, EU/US Plug1. 9. 5 inches super large full screen LCD with large bold red font to display for easy reading. 2. 24 hours real time monitoring the sound level. 3. Support hanging on the wall(recommended) or free standing on the desk. 4. Wide measurement range from 30dB to 130dB, Frequency: 31. 5Hz 8KHz, Resolution: 0. 1dB 1dB. 5. Buzzing and flashing to remind you when the real time measurement is reached to the alarm level, and hold the data for 3s then back to
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.3 ★★★★★
Based on 484 reviews
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Product Reviews
★★★★★ 5
Highly recommend!
Format: Paperback
Fantastic basically physics book! Illustrations are clear and concise, information is just the right combination of easy to understand but still deep enough.
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Reviewed in the United States on April 8, 2025
★★★★★ 5
Very good book
Format: Paperback
My son borrowed the book from local library, he kept reading and became very interested in physics. He asked me to buy one so he could read it anywhere anytime. We are very satisfied with this book.
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Reviewed in the United States on June 1, 2024
★★★★★ 5
Really great basic/intro to physi
Format: Paperback
Purchased as a birthday present for my very smart 14 year old grandson. The book gives simple discussions about most basic elements of physics. I’m hoping it is not too simple but not too complex. First look tells me I made a good choice. I may buy another one just to have around the house for other grand kids. I’ll give an update after he gets into it a bit.
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Reviewed in the United States on January 20, 2025
★★★★★ 4
Good visulization
Format: Paperback
Its a great book with good visualization. Great for learning and reviewing the material.
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Reviewed in the United States on July 16, 2023
★★★★★ 5
Looks good so far!
Format: Paperback, Format: Paperback
I’m a high schooler who has ADHD and I needed resources to clarify the material I learned from my classes. I’m also a visual learner, and this is AMAZING for my mode of learning. I flipped through the book and I’m literally so hyped to get into it. The illustrations are so cool. Never have I felt this excited to actually learn. Thank you Barron’s! I really hope they make more books like these for all subjects.
I will update y’all if I find anything in the book worth noting as I read through.
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Reviewed in the United States on October 22, 2021
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