Shipping Estimate
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- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
FNIRSI Noise Decibel Meter Home Volume Detector, Yellow1. Accuracy: 1. 5dB (based on standard sound source, 94dB@1KHz) 2. Frequency range: 31. 5Hz 8. 5KHz 3. Dynamic range: 3. 50dB 4. Measuring range: 30 130dB 5. Digital display: 4 digits, resolution 0. 1dB, sampling rate 2 times second 6. Dynamic scale display: 1 scale represents 2dB, sampling rate is 2 times second 7. Dynamic scale range: 30 130dB 8. Overload indication: "OVER" and "UNDER" symbols indicate 9. Dynamic characteristics: two reaction
1. Accuracy: 1.5dB (based on standard sound source, 94dB@1KHz)
2. Frequency range: 31.5Hz-8.5KHz
3. Dynamic range: 3.50dB
4. Measuring range: 30-130dB
5. Digital display: 4 digits, resolution 0.1dB, sampling rate 2 times/second
6. Dynamic scale display: 1 scale represents 2dB, sampling rate is 2 times/second
7. Dynamic scale range: 30-130dB
8. Overload indication: "OVER" and "UNDER" symbols indicate
9. Dynamic characteristics: two reaction speeds: FAST (fast) and SLOW (slow)
10. Microphone: 6mm condenser microphone
11. Battery: 600Mah/3.7V lithium battery
12. Dual mode switching, sensitivity adjustable
13. 0.6mm high-precision sensor, accurate capture, immediate response 6cm sound guide tube & silicone pad sound insulation and waterproof pad, enhanced performance
14. Built-in 600Mah lithium battery, Typc-C charging head interface
15. VA color screen, ultra-clear backlight, clear readings, with alarm indicator light
16. Prompt when the upper/lower limit is exceeded. The upper and lower alarm limits can be set separately.
17. Windshield design blocks all interference and is accurate.
18. Anti-slip silicone buttons, skin-friendly, rebound and comfortable to the touch
19. ABS shell, anti-fall and durable
20. Dimensions: 190x61x31mm
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1819 reviews
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Product Reviews
★★★★★ 4
High Quality
My husband is deficient in magnesium and these by far looked like they were of the highest quality . Not sure yet if they help him sleep better but will be purchasing them again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
Better sleep, better mood
This definitely helped my mood and sleeping. It literally changed my default. The only electrolyte that can pass the blood brain barrier. I recommend.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
For better sleep and consultation and calming effect.
It seems to work for me, it makes me calm but energetic, plus I sleep for 8 hours since taking it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 3
Not working for me 100%
Still not sure about how this magnesium affects me. I have only been taking one tablet an hour or two before bedtime. Seems like sometimes I can’t go to sleep after taking it, charges up my brain. Other times I sleep but have crazy dreams. Maybe it works for some, but not others. I’ll try to finish the bottle, but the lack of sleep after taking the Magnesium L-Threonate makes me hesitant to continue some nights. That’s mainly the reason I purchased this brand to include the reviews.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Helps Relax the muscles
I like to take a magnesium supplement daily, usually in the evening before going to be as it helps relax me for sleep
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
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