SKU: 51870546755

For Mobile Phones & Tablets & Laptops, B21

Sale price$36.00 Regular price$40.00
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

For Mobile Phones & Tablets & Laptops, B211. Whether you are an audiophile or casual listener, when it comes to choose a headset, this item is your prior choice. 2. Equipped with sliding touch function (available only in Bluetooth mode). 3. The imitation protein material is used as the ear skin with a soft characteristic sponge, which is still breathable even if worn for a long time. 4. Wide compatibility. compatible with 99% electronic devices with bluetooth function, you can enjoy your

1. Whether you are an audiophile or casual listener, when it comes to choose a headset, this item is your prior choice.
2. Equipped with sliding touch function (available only in Bluetooth mode).
3.The imitation protein material is used as the ear skin with a soft characteristic sponge, which is still breathable even if worn for a long time.
4. Wide compatibility. compatible with 99% electronic devices with bluetooth function, you can enjoy your favorite music whether when you are home or out with your phone or tablets.
5. Equipped with 3.5mm audio port, connect to mobile phone tablets or notebook to listen to music are accessible.
6. Built in 500mAh battery, 3 hours charging time, long use and standby time.
7. Full package large ear muff design, using acoustic sealing structure to reduce leakage.


Specification:
General
Model B21
Types Headset (with mic)
Bluetooth Version V4.0
Speaker 32ohm
Frequency Response 20Hz-20KHz
Transmission Distance Up to 10m
Distortion <=1%
SNR 98dB
Interfaces 3.5mm Earphone Jack
Charging Voltage DC5V
Charging Current <=20mA
Battery
Battery Capacity 500mAh
Charging Time 3 hours
Talk Time Up to 8 hours
Music Time Up to 10 hours
Standby Time up to 300 hours
Dimensions & Weight
Item Size 17x8.5x20cm
Item Weight 277g
Package Weight
One Package Weight 0.56kgs / 1.23lb
One Package Size 15.2cm * 19.4cm * 8.9cm / 5.98inch * 7.64inch * 3.5inch
Qty per Carton 20
Carton Weight 9.50kgs / 20.94lb
Carton Size 50cm * 44cm * 30cm / 19.69inch * 17.32inch * 11.81inch
Loading Container 20GP: 404 cartons * 20 pcs = 8080 pcs
40HQ: 937 cartons * 20 pcs = 18740 pcs

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 51870546755

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4.6 ★★★★★
Based on 30 reviews
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H
Verified Purchase
Hamza Yahya
West Palm Beach, US
★★★★★ 5
SIHOO M18 chair is amazing
Color: Black, Size: Pack of 1
I purchased the SIHOO M18 Ergonomic Chair a few years ago and have really enjoyed it. It’s very comfortable and offers multiple adjustments, whether you want to recline and relax or sit upright for work. The back support is also excellent, and I haven’t had any issues with the chair at all. You can easily tell it’s high quality from the build and appearance—no creaks or noises whatsoever. I highly recommend this chair to anyone in the market for a new office chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
M
Verified Purchase
Megan R Wesby
Massapequa, US
★★★★★ 4
Good budget-friendly option
Color: Black, Size: Pack of 1, Color: Black, Size: Pack of 1
The chair arrived 4 days early and was easy to put together by following the instructions carefully. It feels sturdy and comfortable. It does support the lumbar region of the back and the arm rests are adjustable vertically as well as the head rest. I wish the arm rests were able to rotate in and out for added customization and that the back of the chair could be adjusted up and down for more precise support. But for a budget chair, it does a good job.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
F
Verified Purchase
farmhousewife
Belleville, US
★★★★★ 5
A solid chair for the budget conscious sitter.
Color: Black, Size: Pack of 1
While this is not THE most comfortable chair, let's face it - if you sit for long periods, what chair IS? I bought this chair because I'm making a career change. I've returned to school and spend hours at my desk. At the age of 50, sitting for a long time with my nose pointed toward a book can be hard on the seat, back and neck. I looked at all kinds of office chairs and settled on this one, primarily because it was on sale, was in my budget and so I clicked the "Add to cart" button and hoped for the best. It was delivered, and I had to work that evening, and when I got home my 17-year-old son had assembled it. My theory on the simplicity of assembly can be deduced from that sentence above. He didn't have any extra parts left over and the chair was complete! I sat down. I leaned back. I shifted the lever that keeps the chair in an upright position and sat straight up. Okay! I can live with this. It has been almost two full months of using this chair and I have no problems. Pros: easy to assemble sufficient comfort level - adequate cushion in the seat can be leaned back or pop the lever in to stay straight up rollers on bottom headrest is adjustable affordable easy to clean arm-rests can be moved up or down height adjustment is self-explanatory - you'll figure it out the "lumbar" support is actually comfortable - it's "there" if you back up to it but if you scoot forward just a bit, you won't feel it if you don't want to sit like that Overall this seems like a chair that's going to last me for a few years, at least, and not fall apart. In the context of size, I'm not a small or extra larger person. I'm an average middle-aged woman with meat on the bones. The seat is plenty big enough. I would recommend this chair as an upgrade to the hand-me-down office chair that just isn't comfortable any longer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2023
A
Verified Purchase
Amazon Customer
Battle Creek, US
★★★★★ 5
Love this chair!
Color: Black, Size: Pack of 1
I had an office chair that cost $300 more than this chair - had it for years, then things started breaking down on it. I read about this chair and, wow! I wish I had known about it sooner. It's more comfortable and it's not a chore to sit for a couple of hours working on designs. Wonderful design - supports my back well and it's very stable, easy to adjust.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
R
Verified Purchase
Rogelio Luna
Omaha, US
★★★★★ 5
Genuine Quality
Color: Black, Size: Pack of 1
Absolutely love this office chair! Super comfortable, sturdy, and easy to adjust. It made a huge difference during long hours at my desk, and the quality feels excellent for the price. Highly recommend!
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Reviewed in the United States on May 21, 2026

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