Silence mode how to set up? Pressing test button gives me alarm. What's the point then?

I don't think there is a set up procedure for silent mode. I think that after testing, when the alarm stops, the unit goes into silent mode for 5 minutes to reset itself and then starts monitoring again.

To Seller: What is the battery (lithium) expiry date printed on the box? Thank you.

I bought one of these about a month ago. I don't have the box anymore, but the printing on the unit says replace by 09/2034.

Can this be used outdoors for my patio heater ?

I wouldn't think so as if it's outdoors, any carbon monoxide would just disperse harmlessly in the air. It's only dangerous indoors.

Contact seller I bought two they arrived today one is very quiet the other perfect us this a fault? The other is perfect please devise

When I activated the test procedure the alarm volume increased and was fairly loud.

Fa3820 Carbon Monoxide Detector | Desertcart South Korea

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

₩54770

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Description

🔥 Stay Ahead of the Silent Killer with FireAngel’s 10-Year CO Guardian! 🚨

DUAL ALERT SAFETY - Loud 85 dB chirps combined with a flashing red LED provide unmistakable audible and visual CO danger signals.
CERTIFIED TRUSTED - BSI Kitemark certified and UKCA marked, meeting rigorous British Standards for reliable home and rental safety.
TRAVEL READY COMPACTNESS - Lightweight and portable design fits perfectly in homes, caravans, and even on the go—never compromise on safety.
DECADE LONG PEACE OF MIND - Tamper-proof 10-year sealed battery ensures uninterrupted CO protection without the hassle of replacements.
SMART EARLY WARNING SYSTEM - High sensitivity mode triggers pre-alarms at 180 ppm CO levels, giving you crucial extra seconds to ventilate and act.

The FireAngel FA3820 Portable Carbon Monoxide Detector features advanced electrochemical sensing technology with a tamper-proof 10-year sealed battery, delivering reliable, long-lasting protection. Its compact, travel-friendly design and dual alert system (audible 85 dB alarm plus flashing LED) ensure you’re warned early of dangerous CO levels. Certified to the highest UK safety standards, this device offers smart pre-alarm warnings and alarm memory, making it an essential, trusted safeguard for homes, rentals, and mobile living spaces.

Specifications

ASIN	B0B9HC17ZG
Alarm	Audible
Best Sellers Rank	241 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Carbon Monoxide Detectors
Brand	FireAngel
Colour	White
Country of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (3,488)
Included Components	1 x Carbon Monoxide Detector (with sealed battery), 1 x Manual
Item Dimensions D x W x H	3.3D x 12.5W x 6.7H centimetres
Item Highlight	1-Pack, 10-Year Sealed Battery Carbon Monoxide Alarm for Home & Travel, CO Alarm Monitor for Caravans, Campervans & Cars
Item Type Name	Carbon Monoxide Alarm
Item Weight	95 Grams
Manufacturer	FireAngel
Manufacturer Contact Information	FireAngel Safety Technology Limited, Vanguard Centre Coventry, CV4 7EZ, UK.
Manufacturer Warranty Description	5 year manufacturer's warranty.
Material	Plastic
Model Number	FA3820
Number of Items	1
Part Number	FA3820
Power source	Battery Powered
Product Style	Single
Sensor Type	Electrochemical
UPC	816317006020
Unit Count	1.0 count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

₩54770

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews

FA3820 Carbon Monoxide Detector

Details

Details

Description

Specifications

Common Questions