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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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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
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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]
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4.8 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 4
Definitely tough but not enough
Color: Black & Lake Blue, Color: Black & Lake Blue
I've been searching high and low for a durable and engaging toy for my 90lb american bulldog. She's destroyed countless toys and her number of toys just keep rising. This lasted for a few hours before she was able to chew off the rubber shell. But now shes still enjoying the hard plastic ball on the inside. Its also a perfect size of ball for her as she can fit it in her jaws comfortably without any worry of he swallowing it. Wish the outside shell was more durable though.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Large ball, still makes noise and hasn’t chewed it up yet.
Color: Black & Lake Blue
He loves playing with it and it actually doesn’t get swallowed up in his very large mouth. He can still bark talk with it in his mouth which is impressive due to its larger than a softball. It nice because I don’t feel like I’m shoving my hand in his mouth to get it out which baseball size or smaller things I do. He hasn’t chewed it up like he does other squeak toys and it makes lots of noise when tossed and bouncing. It’s hard and he insists on playing with it. we broke a pot when we accidentally hit the pot with the ball. He is always bringing me toys to throw down the hall as we watch tv. I’m like no not that one get a different one. I’m afraid I’ll break something with that one due to how heavy and large it is. That one is an outside toy, he still brings me this one daily and we’ve had it for several weeks now. Plus my cousin little boy just visited and he loved playing with it too. Its made out of material that’s easy to clean for the 17month old to play with in his play pen. It’s not so heavy you can’t throw it just heavier than the others I’m willing to toss down the hall.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Great dog toy
Color: Black & Yellow
Such fun toy. Excellent product
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Reviewed in the United States on May 9, 2026
★★★★★ 2
Not a chew toy.
Color: Black & Lake Blue
The inside it a hard plastic, my dog can’t chew it. Plastic on the outside is very durable, my dog likes the noise it makes and will chase it but loses interest fast. I will not buy again.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Durable
Color: Black & Yellow
The ball is durable and makes a sound that keeps my puppy interested in playing with it.
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Reviewed in the United States on May 29, 2026