Skip to main content
Hi
!
Hi!
Sign in
or
register
Daily Deals
Brand Outlet
Gift Cards
Help & Contact
Sell
Watchlist
Expand Watch List
My eBay
Expand My eBay
Summary
Recently Viewed
Bids/Offers
Watchlist
Purchase History
Buy Again
Selling
Saved Feed
Saved Searches
Saved Sellers
My Garage
Sizes
My Collection
Messages
PSA Vault
Expand Notifications
Please
sign-in
to view notifications.
Expand Cart
Loading...
eBay Home
Shop by category
All Categories
Search
Advanced
Best selling products: Best
Wi-Fi Home Smoke & Gas Detectors
Bestselling
Top Rated
1
Rank 1
Google Nest Protect Smoke and Carbon Monoxide Alarm 2nd Gen - S3000BWES
(406)
$135.00 New
$135.00 New
$99.99 Used
$99.99 Used
2
Rank 2
Google Nest Protect Carbon Monoxide Smoke Detector - S3003LWES
(204)
$16.00 New
$16.00 New
$14.54 Used
$14.54 Used
3
Rank 3
Kidde i4618 Firex Hardwired Smoke Alarm
(2)
$25.00 New
$25.00 New
---- Used
No used products available
4
Rank 4
Kidde Smart Features Hardwired Wi-Fi Enabled Smoke Detector 21032064
(1)
$18.50 New
$18.50 New
---- Used
No used products available
5
Rank 5
** - AIRTHINGS 2951 WAVE 2ND GEN RADON DETECTOR -
(4)
$39.00 New
$39.00 New
$35.00 Used
$35.00 Used
6
Rank 6
Kidde 21007581 Hardwired Smoke Alarm with Battery Backup
(220)
$27.95 New
$27.95 New
$23.99 Used
$23.99 Used
7
Rank 7
2025 SITERWELL Hardwired Combination Carbon Monoxide & Smoke Alarm Authentic
(1)
$48.99 New
$48.99 New
---- Used
No used products available
8
Rank 8
Kidde Smart Smoke Carbon Monoxide Alarm Detector - P4010ACSCOAQWF
(7)
$26.39 New
$26.39 New
---- Used
No used products available
9
Rank 9
Honeywell 5800SMOKEV Wireless Smoke Heat Detecto Factory / w Battery
(2)
$60.00 New
$60.00 New
$32.00 Used
$32.00 Used
10
Rank 10
Kidde 10 Year Sealed-In Battery-Powered Ionization Smoke Alarm
(7)
$17.56 New
$17.56 New
---- Used
No used products available
11
Rank 11
Kidde 120v Hardwire Smoke Detector Battery Backup Voice Alarm P4010acs
(3)
$19.99 New
$19.99 New
---- Used
No used products available
12
Rank 12
Google Nest Temperature Sensor - White (T5000SF)
(84)
$19.99 New
$19.99 New
$18.99 Used
$18.99 Used
13
Rank 13
Kidde P4010ACSAQ-WF Indoor Smoke Alarm - White
(3)
$19.99 New
$19.99 New
---- Used
No used products available
14
Rank 14
Kidde 30CUA10 Detect Smoke Carbon Monoxide Alarm 3 Pack
$39.55 New
$39.55 New
---- Used
No used products available
15
Rank 15
BRK First Alert 9120B Smoke Detector
(569)
$21.26 New
$21.26 New
$15.25 Used
$15.25 Used
16
Rank 16
Kidde Detect Smoke Alarm -2 Pack - Model 20SD10 - 10-Year Battery - Made in 2024
$30.36 New
$30.36 New
---- Used
No used products available
17
Rank 17
2 BRK Combination Smoke/Carbon Monoxide Alarm Hardwired 2024 Aug 01
(2)
$34.99 New
$34.99 New
$18.95 Used
$18.95 Used
18
Rank 18
5 PACK SITERWELL Hardwired Smoke Alarm Carbon Monoxide Detector Interconnected
$124.99 New
$124.99 New
---- Used
No used products available
19
Rank 19
Digital Radon Detector Airthings 2350
(99)
$49.95 New
$49.95 New
---- Used
No used products available
20
Rank 20
Kidde P4010ACSCO-WF Smoke + Carbon Monoxide Smart Alarm
(1)
$32.99 New
$32.99 New
---- Used
No used products available
21
Rank 21
BRK SC9120B Smoke & Carbon Monoxide Detector
(24)
$49.98 New
$49.98 New
$28.99 Used
$28.99 Used
22
Rank 22
Kidde 900-CUAR Smoke & Carbon Monoxide Detector Alarm - 21032250
(8)
$29.99 New
$29.99 New
$28.95 Used
$28.95 Used
23
Rank 23
Airthings 223 Corentium Home Radon Detector
(189)
$70.99 New
$70.99 New
$46.89 Used
$46.89 Used
24
Rank 24
Ring 4SS1S8-0EN0 Alarm Smoke & CO Listener
(16)
$22.99 New
$22.99 New
$17.99 Used
$17.99 Used
25
Rank 25
Kidde KN-COPP-B-LPM Battery Operated Carbon Monoxide Alarm w/Digital Display 824
(3)
$20.99 New
$20.99 New
---- Used
No used products available
26
Rank 26
Kidde 21007588 120V AC wire-in Hush Smoke Alarm with Battery Backup - 4 Pack
(42)
$98.00 New
$98.00 New
$29.99 Used
$29.99 Used
27
Rank 27
Kidde KN-COP-DP-10YL-AQ-WF Carbon Monoxide Alarm w/ Indoor Air Quality Monitor
(3)
$20.97 New
$20.97 New
$17.99 Used
$17.99 Used
28
Rank 28
Kidde 30CUAR Detect Smoke Carbon Monoxide Alarm
(3)
$29.00 New
$29.00 New
---- Used
No used products available
29
Rank 29
Kidde 21006377 Hardwired Combination Carbon Monoxide & Smoke Alarm
(181)
$99.95 New
$99.95 New
$60.00 Used
$60.00 Used
30
Rank 30
First Alert 9120B6CP Smoke Alarm - 6 Pack
(38)
$89.26 New
$89.26 New
$12.34 Used
$12.34 Used
31
Rank 31
Lot Of (6) Kidde Firex Smoke Detector Hardwired
$25.19 New
$25.19 New
---- Used
No used products available
32
Rank 32
Kidde Detect Smoke Carbon Monoxide Alarm 10-Year Battery 30CUD10
$29.99 New
$29.99 New
$20.99 Used
$20.99 Used
33
Rank 33
Kidde Kitchen Combination Smoke Carbon Monoxide Alarm 10-Year Lithium Battery
(33)
$24.99 New
$24.99 New
$24.99 Used
$24.99 Used
34
Rank 34
Kidde KN-COEG-3 Explosive Gas Alarm Carbon Monoxide Alarm Detector with Battery
(111)
$28.00 New
$28.00 New
$19.99 Used
$19.99 Used
35
Rank 35
Kidde 21006378 Hardwire Smoke Alarm Detector
(124)
$24.85 New
$24.85 New
---- Used
No used products available
36
Rank 36
Kidde FireX KN-COPE-IC Smoke & Carbon Monoxide Alarm 21007624 Photoelectric
(51)
$46.00 New
$46.00 New
$24.99 Used
$24.99 Used
37
Rank 37
Kidde 30CUAR-V Smoke Carbon Monoxide Detector Alarm Hardwire Battery
$38.99 New
$38.99 New
---- Used
No used products available
38
Rank 38
X-SENSE 3pack Combination Smoke and Carbon Monoxide Alarm - 10 YR Batt Life SC07
(6)
$25.00 New
$25.00 New
---- Used
No used products available
39
Rank 39
First Alert Smoke Detector - White
(19)
$15.00 New
$15.00 New
---- Used
No used products available
40
Rank 40
Kidde Smart Smoke Detector Model P4010ACS-WF Open Box
(1)
$20.00 New
$20.00 New
---- Used
No used products available
41
Rank 41
First Alert CO710 Carbon Monoxide Detector with Digital Temperature Display (1039753)
(10)
$27.95 New
$27.95 New
$9.00 Used
$9.00 Used
42
Rank 42
Airthings 2950 Smart Radon Detector - White
(7)
$34.99 New
$34.99 New
---- Used
No used products available
43
Rank 43
First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery
(32)
$18.00 New
$18.00 New
$12.49 Used
$12.49 Used
44
Rank 44
Kidde i9010 Smoke Alarm
(11)
$17.99 New
$17.99 New
---- Used
No used products available
45
Rank 45
First Alert BRK SMICO105-AC Smoke/Carbon Mono Alarm Pack of 6 Pieces
(4)
$54.95 New
$54.95 New
---- Used
No used products available
46
Rank 46
Kidde 20SA10 Hardwired Interconnected Smoke Detector with Photoelectric sensor
(3)
$25.82 New
$25.82 New
---- Used
No used products available
47
Rank 47
Kidde Firex Battery Operated Smoke and Carbon Monoxide Detector - White
(39)
$44.99 New
$44.99 New
---- Used
No used products available
48
Rank 48
Kidde 21026056 Model i9040 Ionization Smoke Alarm
(186)
$18.00 New
$18.00 New
$13.50 Used
$13.50 Used
49
Rank 49
Kidde 21029886 Firex Smoke Detector Hardwired with Battery Backup Front Load D
(21)
$29.99 New
$29.99 New
---- Used
No used products available
50
Rank 50
First Alert SC9120B Smoke and Carbon Monoxide Detector
(329)
$54.95 New
$54.95 New
---- Used
No used products available
51
Rank 51
2pack Kidde Smoke & Carbon Monoxide Alarm Detector Battery 30CUDR
$29.39 New
$29.39 New
---- Used
No used products available
52
Rank 52
BRK 1046858 FirstAlert Ionization Smoke Alarm with Lithium Battery (SMI110)
$17.99 New
$17.99 New
---- Used
No used products available
53
Rank 53
Kidde 9CO5-LP2 Battery Powered Carbon Monoxide Alarm
(106)
$10.79 New
$10.79 New
---- Used
No used products available
54
Rank 54
Kidde 201025759 120V Tamper Resistant Plug-In Carbon Monoxide Detector
(56)
$17.99 New
$17.99 New
$9.75 Used
$9.75 Used
55
Rank 55
Airthings 2928 Wave Mini Battery Operated Smart Indoor Air Quality Monitor
(1)
$19.95 New
$19.95 New
$14.89 Used
$14.89 Used
56
Rank 56
Google Nest 2nd Gen Protect Smoke and Carbon Monoxide Alarm Detector with Battery - White
(39)
$149.99 New
$149.99 New
$39.99 Used
$39.99 Used
57
Rank 57
Kidde KN-COSM-BA Battery Operated Combination Smoke and Carbon Monoxide Alarm - White
(30)
$69.99 New
$69.99 New
---- Used
No used products available
58
Rank 58
Kidde 21028744 Smoke Alarm - i9010
(43)
$18.99 New
$18.99 New
$9.95 Used
$9.95 Used
59
Rank 59
First Alert 1042409 Photoelectric Smoke Detector - 2 Pack
(11)
$28.99 New
$28.99 New
---- Used
No used products available
60
Rank 60
First Alert CO250B Carbon Monoxide Alarm Detector
(21)
$10.95 New
$10.95 New
---- Used
No used products available
61
Rank 61
Airthings Wave Mini Smart Indoor Quality Monitor Model 2928
(10)
$17.95 New
$17.95 New
---- Used
No used products available
62
Rank 62
KIDDE 30CUD10-V Detect Smoke Carbon Monoxide Alarm. .
$34.00 New
$34.00 New
---- Used
No used products available
63
Rank 63
First Alert 1039868 Battery-Powered Smoke & Carbon Monoxide Alarm - White
(84)
$24.99 New
$24.99 New
---- Used
No used products available
64
Rank 64
Interconnectable Wireless Photoelectric Smoke Alarm Battery Backup Fire Detector
$44.79 New
$44.79 New
---- Used
No used products available
65
Rank 65
SAFE-T-ALERT 35-742-WHT 603.111 Safe-T-Alert 35-742-WT Dual LP/CO Alarm - 12V
$49.99 New
$49.99 New
---- Used
No used products available
66
Rank 66
Kidde 20SA10 Hardwired 10yr Smoke Alarm Detector Photoelectric sensor -
$20.95 New
$20.95 New
---- Used
No used products available
67
Rank 67
Kidde 900007601 Nighthawk Carbon Monoxide Alarm with Digital Display - White
(186)
$15.00 New
$15.00 New
$14.99 Used
$14.99 Used
68
Rank 68
Kidde P3010CU Smoke and Carbon Monoxide Combination Detector - White, 2 Pack
(20)
$75.00 New
$75.00 New
---- Used
No used products available
69
Rank 69
Honeywell Resido 5800CMBOV Combination Smoke / CO Detector
$399.00 New
$399.00 New
---- Used
No used products available
70
Rank 70
First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Battery
(107)
$20.00 New
$20.00 New
---- Used
No used products available
71
Rank 71
Kidde 21033083 Combo Smoke/CO Alarm 5" Photoelectric Hardwired LED
$38.99 New
$38.99 New
---- Used
No used products available
72
Rank 72
First Alert CO400 Carbon Monoxide Alarm Detector
(173)
$16.95 New
$16.95 New
$14.00 Used
$14.00 Used
73
Rank 73
System Sensor 2WTA-B I3 Series Smoke Detector
(6)
$50.00 New
$50.00 New
$20.24 Used
$20.24 Used
74
Rank 74
Kidde Detect Smoke Alarm Model 20SD10 - 10 YEAR BATTERY -
$25.00 New
$25.00 New
---- Used
No used products available
75
Rank 75
First Alert 1046731 10-YEAR BATTERY SMOKE ALARM SM210
$22.86 New
$22.86 New
---- Used
No used products available
76
Rank 76
Honeywell Resideo Prosixsmokev Sixsmokeva 2-way Wireless Smoke Detector
$64.95 New
$64.95 New
---- Used
No used products available
77
Rank 77
Kidde Carbon Monoxide Alarm 120v Direct Wire W Battery Backup 900-0120 B24
(15)
$23.00 New
$23.00 New
---- Used
No used products available
78
Rank 78
BRK 7010B 120V AC/DC Photo Smoke Alarm
(1)
$19.90 New
$19.90 New
---- Used
No used products available
79
Rank 79
X-Sense Combination SC07 6-pack Interconnected Smoke & CO Alarm
(5)
$24.99 New
$24.99 New
---- Used
No used products available
80
Rank 80
Kidde Hardwired Smoke and Combination Detector Alarm Adapters 21028461
(4)
$9.00 New
$9.00 New
---- Used
No used products available
81
Rank 81
First Alert 1039871 Alarm Smoke - White
(37)
$23.99 New
$23.99 New
---- Used
No used products available
82
Rank 82
First Alert CO1210CP1 Carbon Monoxide Alarm - White
(29)
$11.88 New
$11.88 New
---- Used
No used products available
83
Rank 83
4 Pack - kidde smoke and carbon monoxide alarm
$35.00 New
$35.00 New
$22.46 Used
$22.46 Used
84
Rank 84
Kidde Quick Connect Smoke Detector Adapter Plug Smoke Alarm Wiring Harness ...
(2)
$7.66 New
$7.66 New
---- Used
No used products available
85
Rank 85
Kidde P4010DCS-W Battery Powered Wire-Free Interconnected Smoke Alarm - White (21027317)
(7)
$79.99 New
$79.99 New
---- Used
No used products available
86
Rank 86
Honeywell Farenhyt Series Black 15-32 VDC Intelligent Addressable Photoelectric Smoke Detector (IDP-PHOTO-W)
$80.46 New
$80.46 New
$55.00 Used
$55.00 Used
87
Rank 87
Kidde 30CUA10-V Smoke & Carbon Monoxide Detector
$34.99 New
$34.99 New
$24.99 Used
$24.99 Used
88
Rank 88
Kidde 20SD10 Smoke Detector LED Warning Light New. Open Box.
$29.00 New
$29.00 New
---- Used
No used products available
89
Rank 89
First Alert Smoke & Fire Detector Alarm SA67D 9v
(12)
$12.99 New
$12.99 New
---- Used
No used products available
90
Rank 90
Kidde Carbon Monoxide Alarm Kn-copp-b Nighthawk Technology See Notes
(5)
$16.95 New
$16.95 New
$14.00 Used
$14.00 Used
91
Rank 91
First Alert P1010 10-Year Battery Atom Photoelectric Micro Smoke Alarm - White (1039765)
(5)
$30.00 New
$30.00 New
---- Used
No used products available
92
Rank 92
Kidde Pi9010 Smoke Detector Alarm
(11)
$29.99 New
$29.99 New
---- Used
No used products available
93
Rank 93
X-Sense SC07-MR51 Smart 5 Smoke Detector Carbon Monoxide Detector Combo With
$200.00 New
$200.00 New
---- Used
No used products available
94
Rank 94
Kidde 21010170 Smoke and Carbon Monoxide Alarm - White
(48)
$60.00 New
$60.00 New
---- Used
No used products available
95
Rank 95
Kidde i9050 Battery Operated Smoke Alarm ( in )
(6)
$17.50 New
$17.50 New
---- Used
No used products available
96
Rank 96
First Alert C0400 Carbon Monoxide Alarm - White
(39)
$16.49 New
$16.49 New
$9.99 Used
$9.99 Used
97
Rank 97
2 BRK 9120BP First Alert Smoke Alarm Detector Battery Backup 120v Hardwired
(6)
$22.99 New
$22.99 New
---- Used
No used products available
98
Rank 98
First Alert CO615 Carbon Monoxide Plug In Alarm
(54)
$23.75 New
$23.75 New
$14.72 Used
$14.72 Used
99
Rank 99
System Sensor CO1224T Carbon Monoxide Detector
(7)
$53.95 New
$53.95 New
$20.00 Used
$20.00 Used
100
Rank 100
2gig SMKT8 Smoke, Heat and Freeze Detector (2GIG-SMKT8-345)
(4)
$64.99 New
$64.99 New
---- Used
No used products available
