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Best selling products: Best
First Alert Z-Wave Home Smoke & Gas Detectors
Bestselling
Top Rated
1
Rank 1
Google Nest Protect Smoke and Carbon Monoxide Alarm 2nd Gen - S3000BWES
(400)
$11.99 New
$11.99 New
---- Used
No used products available
2
Rank 2
Kidde 21029893 10-Year Smoke & CO Detector Voice Alarm Hardwired
$35.99 New
$35.99 New
---- Used
No used products available
3
Rank 3
Google Nest Protect Carbon Monoxide Smoke Detector - S3003LWES
(203)
$16.00 New
$16.00 New
---- Used
No used products available
4
Rank 4
Kidde 21007588 120V AC wire-in Hush Smoke Alarm with Battery Backup - 4 Pack
(40)
$70.00 New
$70.00 New
$69.99 Used
$69.99 Used
5
Rank 5
BRK SC9120B Smoke & Carbon Monoxide Detector
(20)
$17.61 New
$17.61 New
---- Used
No used products available
6
Rank 6
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
7
Rank 7
Kidde 21007581 Hardwired Smoke Alarm with Battery Backup
(217)
$27.99 New
$27.99 New
$10.00 Used
$10.00 Used
8
Rank 8
Google Nest Temperature Sensor - White (T5000SF)
(83)
$22.99 New
$22.99 New
$12.00 Used
$12.00 Used
9
Rank 9
Airthings 223 Corentium Home Radon Detector
(188)
$68.00 New
$68.00 New
$55.00 Used
$55.00 Used
10
Rank 10
AIRTHINGS 2951 WAVE 2ND GEN RADON DETECTOR
(1)
$52.95 New
$52.95 New
$49.95 Used
$49.95 Used
11
Rank 11
Kidde 30CUAR Detect Smoke Carbon Monoxide Alarm
(2)
$34.99 New
$34.99 New
---- Used
No used products available
12
Rank 12
Kidde P4010ACSCO-WF Smoke + Carbon Monoxide Smart Alarm
(1)
$33.99 New
$33.99 New
---- Used
No used products available
13
Rank 13
BRK First Alert 9120B Smoke Detector
(566)
$19.00 New
$19.00 New
$15.00 Used
$15.00 Used
14
Rank 14
Kidde 21006377 Hardwired Combination Carbon Monoxide & Smoke Alarm
(181)
$110.00 New
$110.00 New
$69.95 Used
$69.95 Used
15
Rank 15
Kidde Basic Detector co Alarm KN-COPP-B-LPM (C12-2)
(2)
$20.99 New
$20.99 New
$11.99 Used
$11.99 Used
16
Rank 16
Honeywell 5800SMOKEV Wireless Smoke Heat Detecto Factory / w Battery
(2)
$64.99 New
$64.99 New
---- Used
No used products available
17
Rank 17
Kidde 900-CUAR-V Smoke & Carbon Monoxide Detector - 21032084
(2)
$89.99 New
$89.99 New
---- Used
No used products available
18
Rank 18
Kidde 30CUA10 Smoke & Carbon Monoxide Alarm Hardwired 10-Year Battery |
$40.00 New
$40.00 New
---- Used
No used products available
19
Rank 19
Kidde Smart Smoke Carbon Monoxide Alarm Detector - P4010ACSCOAQWF
(6)
$35.00 New
$35.00 New
$29.91 Used
$29.91 Used
20
Rank 20
First Alert Z-Wave Smoke & Carbon Monoxide Detector Works with Ring
(31)
$29.90 New
$29.90 New
$17.86 Used
$17.86 Used
21
Rank 21
Kidde i9010 Smoke Alarm
(9)
$12.74 New
$12.74 New
---- Used
No used products available
22
Rank 22
Siterwell Carbon Monoxide Detectors 10 Year Product Life CO Detector with LCD...
(7)
$20.99 New
$20.99 New
---- Used
No used products available
23
Rank 23
Kidde 120v Hardwire Smoke Detector Battery Backup Voice Alarm P4010acs
(3)
$21.32 New
$21.32 New
$14.99 Used
$14.99 Used
24
Rank 24
Kidde 900-CUDR AA Battery-Powered Smoke & Carbon Monoxide Detector Alarm
(3)
$26.00 New
$26.00 New
---- Used
No used products available
25
Rank 25
Kidde 10 Year Sealed-In Battery-Powered Ionization Smoke Alarm
(6)
$22.00 New
$22.00 New
---- Used
No used products available
26
Rank 26
Kidde 30CUD10 Smoke & Carbon Monoxide Detector 10-Year Battery Powered LED
(2)
$25.00 New
$25.00 New
---- Used
No used products available
27
Rank 27
Kidde Wire-Free Interconnect, Sealed Battery Combination Smoke and Carbon Monoxide Detector - White
(5)
$85.00 New
$85.00 New
$56.99 Used
$56.99 Used
28
Rank 28
Kidde P4010ACSAQ-WF Indoor Smoke Alarm - White
(1)
$24.99 New
$24.99 New
$22.00 Used
$22.00 Used
29
Rank 29
Kidde 21006378 Hardwire Smoke Alarm Detector
(123)
$23.95 New
$23.95 New
---- Used
No used products available
30
Rank 30
Kidde 201025759 120V Tamper Resistant Plug-In Carbon Monoxide Detector
(53)
$10.00 New
$10.00 New
$9.75 Used
$9.75 Used
31
Rank 31
Kidde Kitchen Combination Smoke Carbon Monoxide Alarm 10-Year Lithium Battery
(33)
$29.99 New
$29.99 New
$23.99 Used
$23.99 Used
32
Rank 32
Kidde Smart Smoke Alarm WiFi Alexa Compatible Hardwired Backup (P4010ACS-WF)
(1)
$26.09 New
$26.09 New
---- Used
No used products available
33
Rank 33
2025 SITERWELL Hardwired Combination Carbon Monoxide & Smoke Alarm Authentic
(1)
$48.99 New
$48.99 New
---- Used
No used products available
34
Rank 34
Kidde P12040 Interconnect Photoelectric Smoke Alarm - 21006371
(21)
$20.00 New
$20.00 New
---- Used
No used products available
35
Rank 35
BRK 1046721 SM100V-AC Interconnect Hardwire Smoke Alarm With Battery Backup
$29.99 New
$29.99 New
---- Used
No used products available
36
Rank 36
Kidde i4618 Firex Hardwired Smoke Alarm
(2)
$19.00 New
$19.00 New
---- Used
No used products available
37
Rank 37
Kidde 900007601 Nighthawk Carbon Monoxide Alarm with Digital Display - White
(183)
$28.47 New
$28.47 New
$15.50 Used
$15.50 Used
38
Rank 38
Kidde Worry-Free Combination Smoke and Carbon Monoxide Alarm
(38)
$38.00 New
$38.00 New
---- Used
No used products available
39
Rank 39
Ring 4SS1S8-0EN0 Alarm Smoke & CO Listener
(15)
$22.99 New
$22.99 New
$11.50 Used
$11.50 Used
40
Rank 40
System Sensor CO1224T Carbon Monoxide Detector
(7)
$50.00 New
$50.00 New
---- Used
No used products available
41
Rank 41
Kidde FIREX Hardwired AA Smoke Carbon Monoxide Alarm 21033083
$39.99 New
$39.99 New
---- Used
No used products available
42
Rank 42
First Alert SC9120B Smoke and Carbon Monoxide Detector
(329)
$58.99 New
$58.99 New
$16.00 Used
$16.00 Used
43
Rank 43
Kidde Smoke & Carbon Monoxide Detector Wired W/ Batt Backup 30CUAR-V
$44.00 New
$44.00 New
$39.99 Used
$39.99 Used
44
Rank 44
Kidde Smoke and Carbon Monoxide Detector (P4010ACSCO-W)
(4)
$59.75 New
$59.75 New
$29.99 Used
$29.99 Used
45
Rank 45
BRK Combination Smoke/Carbon Monoxide Alarm Hardwired Produced 7/2024
(2)
$34.99 New
$34.99 New
$26.99 Used
$26.99 Used
46
Rank 46
Kidde 21029886 Firex Smoke Detector Hardwired with Battery Backup Front Load D
(20)
$29.00 New
$29.00 New
---- Used
No used products available
47
Rank 47
First Alert BRK SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide ...
$36.89 New
$36.89 New
---- Used
No used products available
48
Rank 48
BRK Smoke Alarm SMI105-AC Hardwired
$26.99 New
$26.99 New
---- Used
No used products available
49
Rank 49
KIDDE COMBO SMOKE Carbon Monoxide Alarm 30CUD10-V
$32.00 New
$32.00 New
---- Used
No used products available
50
Rank 50
Kidde 20SA10 Hardwired Smoke Detector Alarm w/ 10 Year Battery Self Testing
(3)
$25.00 New
$25.00 New
---- Used
No used products available
51
Rank 51
Kidde FireX KN-COPE-IC Smoke & Carbon Monoxide Alarm 21007624 Photoelectric
(49)
$45.00 New
$45.00 New
---- Used
No used products available
52
Rank 52
4 x Siterwell LCD 10 Year Carbon Monoxide (CO) Alarm Detector Portable For Home
$67.99 New
$67.99 New
---- Used
No used products available
53
Rank 53
Kidde 20SD10 Smoke Detector 10-Year Battery Powered LED Warning Light
$33.99 New
$33.99 New
---- Used
No used products available
54
Rank 54
Kidde KN-COEG-3 Explosive Gas Alarm Carbon Monoxide Alarm Detector with Battery
(107)
$38.00 New
$38.00 New
$18.40 Used
$18.40 Used
55
Rank 55
Kidde 21028744 Smoke Alarm - i9010
(42)
$18.99 New
$18.99 New
$15.00 Used
$15.00 Used
56
Rank 56
First Alert SC9120B Hardwired Smoke & Carbon Monoxide Detector with Battery Backup
(8)
$59.95 New
$59.95 New
$16.00 Used
$16.00 Used
57
Rank 57
Kidde P3010CU Smoke and Carbon Monoxide Combination Detector - White, 2 Pack
(19)
$55.99 New
$55.99 New
---- Used
No used products available
58
Rank 58
RV Co & Propane Alarm 12 V Flush Mounted LP Detector Model 7770 Brown
(3)
$73.99 New
$73.99 New
---- Used
No used products available
59
Rank 59
Kidde 9CO5-LP2 Battery Powered Carbon Monoxide Alarm
(104)
$8.99 New
$8.99 New
---- Used
No used products available
60
Rank 60
Kidde Photoelectric Smoke Alarm 10 Year Battery P3010l C2
(2)
$25.00 New
$25.00 New
---- Used
No used products available
61
Rank 61
Kidde P4010ACSCO AC Hardwired Combination 1 Carbon Monoxide & Photoelectric
(8)
$31.00 New
$31.00 New
---- Used
No used products available
62
Rank 62
First Alert 1039868 Battery-Powered Smoke & Carbon Monoxide Alarm - White
(84)
$19.99 New
$19.99 New
---- Used
No used products available
63
Rank 63
Airthings Wave Mini Smart Indoor Quality Monitor Model 2928
(10)
$18.99 New
$18.99 New
$17.89 Used
$17.89 Used
64
Rank 64
Kidde 21026056 Model i9040 Ionization Smoke Alarm
(183)
$14.99 New
$14.99 New
$8.00 Used
$8.00 Used
65
Rank 65
Airthings 2950 Smart Radon Detector - White
(6)
$50.00 New
$50.00 New
$45.00 Used
$45.00 Used
66
Rank 66
Kidde Detect Smoke Alarm Model 20SA10 - Hardwired 10 YEARS BATT.
$29.99 New
$29.99 New
---- Used
No used products available
67
Rank 67
Smoke Alarm Carbon Monoxide Combination X-Sense SC07 Photoelectric Sensor
(5)
$25.99 New
$25.99 New
---- Used
No used products available
68
Rank 68
First Alert Photoelectric Smoke Alarm 2 Pack
(63)
$27.96 New
$27.96 New
$25.00 Used
$25.00 Used
69
Rank 69
Resideo 5800COV Wireless CO Detector Honeywell
$95.95 New
$95.95 New
---- Used
No used products available
70
Rank 70
First Alert CO400 Carbon Monoxide Alarm Detector
(172)
$14.59 New
$14.59 New
$14.00 Used
$14.00 Used
71
Rank 71
First Alert Smoke Detector - White
(19)
$19.95 New
$19.95 New
---- Used
No used products available
72
Rank 72
Kidde I12060 Smoke Alarm - White
(40)
$38.49 New
$38.49 New
$23.00 Used
$23.00 Used
73
Rank 73
First Alert 9120B6CP Smoke Alarm - 6 Pack
(38)
$80.00 New
$80.00 New
---- Used
No used products available
74
Rank 74
Kidde Firex Battery Operated Smoke and Carbon Monoxide Detector - White
(39)
$35.00 New
$35.00 New
---- Used
No used products available
75
Rank 75
BRK Interconnect Hardwired Ionization Smoke Alarm (6-Pack) 1046838 BRK 1046838
$67.00 New
$67.00 New
---- Used
No used products available
76
Rank 76
Kidde P3010CU White Smoke & Carbon Monoxide Detector
(3)
$28.50 New
$28.50 New
$20.00 Used
$20.00 Used
77
Rank 77
X-SENSE 3pack Combination Smoke and Carbon Monoxide Alarm - 10 YR Batt Life SC07
(6)
$59.46 New
$59.46 New
---- Used
No used products available
78
Rank 78
BRK Hardwire w/Battery Backup SMI100-AC Ionization Smoke Alarm
$18.00 New
$18.00 New
---- Used
No used products available
79
Rank 79
BRK Electronics FG250B 9v Battery Operated Smoke Alarm
(82)
$14.88 New
$14.88 New
---- Used
No used products available
80
Rank 80
Kidde Carbon Monoxide Alarm Kn-copp-b Nighthawk Technology See Notes
(5)
$19.99 New
$19.99 New
$8.99 Used
$8.99 Used
81
Rank 81
First Alert 1039809 Hard-wired Ionization Smoke Alarm White
(7)
$16.99 New
$16.99 New
---- Used
No used products available
82
Rank 82
Honeywell Resideo 5800COV Carbon Monoxide CO Detector Replaced 5800CO
$81.00 New
$81.00 New
---- Used
No used products available
83
Rank 83
First Alert C0400 Carbon Monoxide Alarm - White
(39)
$16.99 New
$16.99 New
$14.89 Used
$14.89 Used
84
Rank 84
First Alert 3120B Hardwired Smoke Alarm
(2)
$34.99 New
$34.99 New
$12.00 Used
$12.00 Used
85
Rank 85
Contractor 6-PACK First Alert BRK Wired Smoke Carbon Monoxide Alarm SMIC0100-AC
$149.99 New
$149.99 New
---- Used
No used products available
86
Rank 86
Kidde 20SA10 Smoke Detector Hardwire Interconnect 10 Year Battery Back Up
(1)
$30.00 New
$30.00 New
---- Used
No used products available
87
Rank 87
KIDDE Smoke Carbon Monoxide Alarm 30CUDR-V Voice Alerts Detector. Box Damage
$36.00 New
$36.00 New
---- Used
No used products available
88
Rank 88
First Alert Smoke & Fire Detector Alarm SA67D 9v
(12)
$17.95 New
$17.95 New
---- Used
No used products available
89
Rank 89
Kidde Carbon Monoxide Alarm 120v Direct Wire W Battery Backup 900-0120 B24
(15)
$25.00 New
$25.00 New
$10.00 Used
$10.00 Used
90
Rank 90
First Alert Electric Smoke and Carbon Monoxide Detector (PRC710B)
(15)
$29.99 New
$29.99 New
$19.99 Used
$19.99 Used
91
Rank 91
Resideo Honeywell Wireless Smoke/Carbon Monoxide CO Combo Detector 5800CMBOV
$168.99 New
$168.99 New
---- Used
No used products available
92
Rank 92
First Alert BRK SC7010BV Talking Photoelectric Smoke and Carbon Monoxide Alarm - White
(49)
$75.00 New
$75.00 New
---- Used
No used products available
93
Rank 93
Google Nest S3003LWEF Smoke & Carbon Monoxide Detector
(2)
$115.00 New
$115.00 New
---- Used
No used products available
94
Rank 94
Kidde Firex Battery Operated Digital Carbon Monoxide Detector
(9)
$23.74 New
$23.74 New
$10.00 Used
$10.00 Used
95
Rank 95
Kidde 30CUDR Smoke & Carbon Monoxide Detector
$28.01 New
$28.01 New
---- Used
No used products available
96
Rank 96
First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery
(32)
$14.00 New
$14.00 New
---- Used
No used products available
97
Rank 97
Siterwell Combo Smoke Carbon Monoxide Detector Alarm Hardwired A8612B-6AR
$34.00 New
$34.00 New
---- Used
No used products available
98
Rank 98
BRK SMI100 Battery Operated Smoke Alarm
$17.96 New
$17.96 New
---- Used
No used products available
99
Rank 99
2GIG CO8 Wireless Carbon Monoxide Detector - White
(2)
$94.99 New
$94.99 New
---- Used
No used products available
100
Rank 100
Kidde i9050 Battery Operated Smoke Alarm ( in )
(5)
$15.00 New
$15.00 New
---- Used
No used products available
