Are these just eat muffs or actual Noise cancellation? What batteries do they take? What frequency range do they cancel?

Dear Valued Customer, They are noise cancelling ear muffs with adjustable headbands, Designed for a tight fit to keep your ears and hearing safe and without strain. If you experience other issues, please contact us by clicking the link below. https://www.amazon.com/gp/help/contact-seller/contact-seller.html?marketplaceID=ATVPDKIKX0DER&sellerID=A3US6EPPMUS293&ref_=v_sp_contact_seller Onhear Team

How is this for blocking out conversations in an office?

I've never used them in that setting but it would probably reduce the noise but not completely get rid of it. I put them on and turned the TV up real loud and it reduced the noise but I still heard the tv.

what is real weight? top of page says 7.65oz but grid says 8.6?

I don't know I know is tight,I take it off every I can at work.

What is the tested NRR level?

If you read the product information section of this item it gives the answer you seek. Knowledge about NRR and SNR ratings: SNR rating = 36dB SNR (single number rating) is the system for the European Union NRR rating = 29dB NRR (noise reduction rating) is the system for USA/ANSI standards NRR 29dB/ SNR 36dB Hearing Protection Our hearing protection earmuffs are made with noise-dampening sponge material, offering a 29dB Noise Reduction Rating to protect your ears from noise damages.

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Ear Protection Headphones for Adults Kids, NoiseCancelling Headphones for Autism, Adjustable NoiseCancelling Ear Muffs, Earmuffs Hearing Protection, Effective Noise-Reducing Ear Muffs

Product ID: 435444299

🎧Ultra-Light 7.65 oz Comfort

🔇29 dB Noise Reduction

🛡️CE & ANSI Certified Safety

29457CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔕 Silence the noise, amplify your focus.

ALL DAY WEAR COMFORT - Feather-light 7.65 oz design with plush acoustic foam and skin-friendly leather for pain-free use.
BUILT TO BEND NOT BREAK - Durable polymer frame offers high resilience and flexibility—ready for any active lifestyle or job site.
CUSTOM FIT FOR EVERY HEAD - Adjustable telescopic steel headband flexes to fit adults and teens, ensuring secure, headache-free wear.
CERTIFIED SAFETY ASSURANCE - CE & ANSI certified to protect your hearing in the loudest environments with trusted reliability.
INDUSTRY LEADING NOISE BLOCKADE - Cut through chaos with 29 dB sound isolation—perfect for work, play, or sensory needs.

Onhear Noise-Cancelling Ear Protection Headphones deliver premium 29 dB noise reduction with CE and ANSI certifications. Designed for adults and teens, these ultra-light earmuffs feature double-layer sound-blocking foam and a flexible, adjustable headband for all-day comfort and a secure fit. Ideal for shooting, construction, sensory sensitivity, and noisy environments, they combine rugged durability with plush, skin-friendly materials to protect your hearing without sacrificing style or comfort.

Specifications

ASIN	B09XF2PJRL
Age Range Description	Adults and Teenagers
Best Sellers Rank	#89,220 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #128 in Safety Earmuffs
Brand Name	Onhear
Collection Name	Health
Color	Dark Black
Customer Reviews	4.4 out of 5 stars 1,392 Reviews
Fit Type	Over the Head
Fit to Size Sentiment	Positive
Garment Size Country	United States
Import Designation	Imported
Item Dimensions	3.03 x 6.1 x 7.09 inches
Item Weight	7.65 ounces
Material Type	Foam, Leather
Noise Control	Sound Isolation
Noise Reduction Rating	29 db
Number of Items	1
Number of Packs	1
Pattern	Solid
Product Style	Modern
Single Number Rating	36 db
Style Number	SA-8-11
UPC	617201106327
Unit Count	1 Pack

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