I have 9120b detectors in my house now. I see these are 9120bff. Do you know what the difference is and will they work?

I don't see a difference that would cause a problem with them communicating with each other. They also look the same. Not sure if this helps, good luck

when is the espiration date?

Thank you for your question. This unit has a 10 yr warranty that starts from the date of purchase.

can you put a ten year battery in this?

I don't see why you couldn't. A 9 volt battery is a 9 volt battery..

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack

Product ID: 72948431

Details

Alarm
Audible
Brand
First Alert
Color
White
Compatible Devices
smoke alarms
Item Weight
9.6 ounces
Operating Humidity
10-95% RH

🔋9V battery backup for power outages

🔗Interconnect up to 18 units

🔧Easy open mounting & side-load battery

₨3936

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

Description

🔥 Stay ahead of danger with the smartest smoke alarms on the block! 🔥

SMART SILENCE TEST - Single button to silence nuisance alarms or test functionality, saving you time and stress.
UNINTERRUPTED SAFETY - 120V hardwired power with 9V battery backup ensures your home stays protected even during outages.
SEAMLESS CONNECTIVITY - Interconnect up to 18 alarms and devices so every corner of your home sounds the alert simultaneously.
BUILT TO LAST A DECADE - 10-year limited warranty with dust cover protection means reliable, maintenance-free safety for years.
QUICK SECURE INSTALLATION - Open mounting design with gasketless base and tamper-resistant locking pins for hassle-free setup and peace of mind.

The First Alert BRK SMI100-AC 6-pack hardwired smoke detectors combine 120V AC power with 9V battery backup, ionization sensors for fast fire detection, and interconnectivity of up to 18 units. Designed for easy installation with tamper-resistant features and a single-button silence/test function, these alarms deliver reliable, maintenance-free protection backed by a 10-year limited warranty.

Specifications

ASIN	B07B4CGQLT
Alarm	Audible
Best Sellers Rank	#2,945 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Smoke Detectors & Fire Alarms
Brand	First Alert
Built-In Media	9-volt battery (6), First Alert BRK 9120B Hardwired Smoke Alarms with Battery Backup (6), Mounting brackets with hardware (6)
Color	White
Compatible Devices	smoke alarms
Customer Reviews	4.6 4.6 out of 5 stars (1,245)
Item Dimensions D x W x H	2.2"D x 5.6"W x 5.6"H
Item Type Name	Smoke Detectors
Item Weight	9.6 ounces
Manufacturer	First Alert
Mfr Part Number	9120BFF-6
Model Number	9120B
Number of Items	6
Operating Humidity	10-95% RH
Power Source	Battery Powered
Product Style	Hardwired
Sensor Type	Ionization
UPC	029054019387 029054019226
Unit Count	6 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

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Reema J.

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

1 month 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.