$(csi.user.businessName)

Main Content

Loading...

Early Black Friday Deals & DoorbustersEnds Nov. 15.Shop now

Skip to content Go to Product Search

Visit our Support Center
Check your Order Status
Shipping, Delivery & Store Pickup
Returns & Exchanges
Price Match Guarantee

Order & Purchases

Check Order Status
Shipping, Delivery & Pickup
Returns & Exchanges
Price Match Guarantee
Product Recalls
Trade-In Program
Gift Cards

Payment Options

My Best Buy® Credit Card
Pay Your Bill at Citibank
Lease to Own
Buy Now, Pay Later
Best Buy Business Financing

Support & Services

Visit our Support Center
Schedule a Service
Manage an Appointment
Protection & Support Plans
Haul Away & Recycling
Contact Us

Rewards & Membership

My Best Buy Memberships
View Points & Certificates
Member Offers

Partnerships

Sell on Best Buy Marketplace
Advertise with Us
Affiliates: Creators & Publishers
Best Buy Health
Best Buy Education
Best Buy Business
Partner+

About Best Buy

Corporate Information
Careers
Corporate Responsibility
Sustainability

Sign in or Create Account

Get the latest deals and more.

Email Address

Best Buy appLearn more ›

Best Buy Canada

Accessibility Terms & Conditions Privacy Interest-Based Ads State Privacy Rights Health Data Privacy Do Not Sell/Share My Personal Information Limit Use of My Sensitive Personal Information Targeted Advertising Opt Out CA Supply Chain Transparency Act

In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.

Black Friday Deals

Deal of the Day

My Best Buy Memberships

Best Buy Business

Best Buy Gamers

Bosch Smart Home Smoke Detector II search results

Filters

Skip To Results

Get it fast

Pickup · Ready todaySelect Store

Shipping · Get it today55423

Sold & shipped by

Best Buy

Category

Home Security & Monitoring

Home Alarms & Sensors

Door & Window Security

Price

to

Less than $25

$25 - $49.99

$50 - $74.99

$75 - $99.99

$100 - $149.99

$150 - $199.99

$250 - $499.99

$750 - $999.99

Brand

First Alert

X-SENSE

Kidde

ecobee

Ring

SPT

Eve

Google

Features

App Compatible

Battery Backup

Plug-In

Bluetooth

Remote Control

Weather Resistant

Color

White

Black

Blue

Multi

Gray

Silver

Power Source

Battery-powered

Hard wired

Plug-in

Customer Rating

Top-Rated

5

4 & Up

Brand Compatibility

Kidde

First Alert, BRK

Ring

Fosmon

Ultrahuman

X-SENSE

Works With

Amazon Alexa

Google Home

Ring

Apple Home

Hue

Nest

Wink

Apple HomeKit

Voltage

3 volts

120 volts

121 volts

1.5 volts

Bosch Smart Home Smoke Detector II in Smart Home (86)

Search all categories

Sort by:

Sponsored

Sponsored

Sponsored

Sponsored

Front. Ultrahuman - HOME - PM1, PM2.5, PM10, and CO Particulate Sensor - VOC, CO, CO2 HCHO, Smoke, Noise, Motion, and Light Detector - Silver.

Ultrahuman - HOME - PM1, PM2.5, PM10, and CO Particulate Sensor - VOC, CO, CO2 HCHO, Smoke, Noise, Motion, and Light Detector - Silver

Syndicated rating, 4.857143 out of 5 stars with 7 reviews on Ultrahuman.

(7 reviews from Ultrahuman)

Compare

X-SENSE

IMPORTANT: REFER TO OWNER'S MANUAL FOR OPERATING INSTRUCTIONS

Green - Power
Yellow - Fault
Red - Alarm
Move to fresh air

TEST
SILENCE

DO NOT PAINT

ON TWIST OFF

AUTO-SELF CHECK
10-YEAR BATTERY

X-SENSE - 10-Year Battery Smoke and Carbon Monoxide Detector with Photoelectric Sensor and LED Light 1 Pack - White

Syndicated rating, 4.8333335 out of 5 stars with 6 reviews on X-SENSE.com.

(6 reviews from X-SENSE.com)

Compare

MANUAL

CNES une 1. RETEm NORE Imvetate cO 7 PM RUCTONS n Powe -d -- Rod Acar Sue - - - -- ... MINUN i te Cot P TE OPERATING JPORTANI CO PPM en -e Telo - - - - Aoe - - - M . TITNS 4 PACK 8 N FANT TEST SILENCE i TWILE a - NT hANT TEST SIENCE TWIS N nONERS MANUA 10 METEN 70 I OPORTANO ca PPM I - - - Rut - - - - - - 1 C MINNUAL 150 CPN . TO OPERATA W NT AFORTANT DO 70 PPM NUCTIONS - Poser Tellow - -u - - haut - 9 NO NET PAINT TEST SILENCE A8 TWISE n O NIT PAINT TEST SILENCE twish -N LCD LCD DISPLAY 10-YEAR BATTERY

X-SENSE - 10-Year Battery Smoke and Carbon Monoxide Detector with LCD Display and LED Light 4 Pack - White

Syndicated rating, 4 out of 5 stars with 15 reviews on X-SENSE.com.

(15 reviews from X-SENSE.com)

Compare

BANAL T - - UPEASTING ET APORTAN X-SENSE ! SA -ee - C Faul - - - - - - - +.d MARUAL o DInNER 1 UPERATING DETER IPORTAN SENSE I Geroen - Hdioaa a - - - - - - -- l 4 PACK 5 Lm hean TEST SILENCE i TRINT 1- i I PAINT TEST SILENCE i I de - MARUAL FO cE - CENTEETSI PORTANO X-SENSE -os Poue T . Faut - - - - - - ... an ANDAL FOR nE 2 PERATING RETER SOPORTAN? X-SENSE OAE I -e - Vertoe a - - - - I - ... an1 3 E PAI TEST SILENCE i TAIS - 1 uin PAnN TEST GINE 1 TWIST . n RF WIRELESS LINK 10-YEAR BATTERY

X-SENSE - 10-Year Battery Wireless Interconnected Smoke and Carbon Monoxide Detector with Photoelectric Sensor 4Pack - White

Syndicated rating, 4.8333335 out of 5 stars with 6 reviews on X-SENSE.com.

(6 reviews from X-SENSE.com)

Compare

19-36 of 86 items

Previous 123...5

Sponsored

$399.00$39900

Get it by Thu, Nov 19 • FREE

$37.99$3799

Get it by Fri, Nov 20 • FREE

$146.99$14699

Get it by Fri, Nov 20 • FREE

$164.99$16499

Get it by Fri, Nov 20 • FREE