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USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
FNIRSI SFD?02 4 in 1 Indoor Air Quality Monitor1. Real time HCHO & TVOC Detection 2. HCHO range: 02000? ppm (electrochemical sensor) 3. TVOC range: 010? mg cubic meters (semiconductor sensor) 4. Audible visual alerts when thresholds exceeded; default thresholds: 0. 08? mg cubic meters for HCHO and 0. 30? mg cubic meters for TVOC 5. Comprehensive Air Quality Assessment 6. Displays formaldehyde safety in 5 grades 7. Includes temperature, humidity, and real time clock display 8. Records past data for
1. Real-time HCHO & TVOC Detection2. HCHO range: 0–2000?ppm (electrochemical sensor)
3. TVOC range: 0–10?mg/cubic meters (semiconductor sensor)
4. Audible/visual alerts when thresholds exceeded; default thresholds: 0.08?mg/cubic meters for HCHO and 0.30?mg/cubic meters for TVOC
5. Comprehensive Air Quality Assessment
6. Displays formaldehyde safety in 5 grades
7. Includes temperature, humidity, and real-time clock display
8. Records past data for trend analysis
9. Calculates spatial averages across monitored spaces
10. Estimates remediation time, cost, and materials based on room size
11. 2.4-inch HD tempered-glass display with adjustable backlight
12. Compact and lightweight, 75×45×95?mm
13. Built-in 1000?mAh lithium battery delivers 8–10?h runtime
14. USB-C fast charging (5?V/2?A), fully charged in ~1.5?h
15. Supports operation while charging
Specification:
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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
4.2 ★★★★★
Based on 2379 reviews
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Product Reviews
★★★★★ 5
These hold up very well
Color: White, Size: Standard (Pack of 2)
I have NO luck with pillows. I’ve been in stores & tried them. They seemed ok there. At home, nope. I’ve been getting headaches & neck aches from lousy pillows. I’ll change one, a few nights relief. It doesn’t help that I’m prone to headaches. After reading about different pillows, I settled on these. The reviews were better than so many different ones I was looking at. Including high priced & brand names. I bought the standard size. When I saw, “Customers Usually Keep This”, I kept my fingers crossed. When I received them, I took one out of the package & put my head on it & thought, oh no! This is too hard! I tried it again. Ok….. I slept on it & haven’t had any pains since. It’s soft but firm enough to keep my head from sinking & messing up my neck. I don’t move. No more flipping my pillow over. My head doesn’t go below my neck anymore! This has been 2 months now, but it hasn’t changed at all. I wake up happy, not complaining. No more pains or headaches. This saved me from losing days with a heating pad or an ice pack. The price was excellent for 2 pillows. I can’t believe a blind buy was the answer! These are incredible. Finally, something worked for me.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Awesome Pillows!
Color: White, Size: King (Pack of 2)
These pillows are super soft! I love them. I bought them when I caught a bad cold and needed to prop myself up. Worked so great! Definitely give these pillows a try. They're very reasonably priced too.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Comfortable
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
Fluffy and of good quality.
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Fluffines
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
I am very happy with this Down Alternative Pillow! It is soft, comfortable, and provides great support for my head and neck
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Reviewed in the United States on June 2, 2026
★★★★★ 4
Inexpensive and Nice Quality
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
I was hoping there would be more of a firmness to these pillows, however they are more soft than I was expecting them to be. Id recommend these pillows for someone who wants a fairly non firm pillow.
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Reviewed in the United States on January 18, 2026
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