Description:Add on Door/Window Sensor for Smart WiFi Home Security Kit. Maintains a local monitor and alert when your WiFi is down. Wireless, easy to install, and portable which is ideal for renters Sensors and remotes communicate via radio frequency (433MHz) Add up to 24 sensors/ detectors per kit.
Description:Add on Door/Window Sensor for Smart WiFi Home Security Kit. Maintains a local monitor and alert when your WiFi is down. Wireless, easy to install, and portable which is ideal for renters Sensors and remotes communicate via radio frequency (433MHz) Add up to 24 sensors/ detectors per kit.
in 4 offers
The lowest price for Smart Door/Window Sensor (For Home Security Kit 21518) in White right now is $24.25 at Lights4Less, compared across 4 retailers.
The all-time low was $23.92 on 31 Dec 2025 — today's price is 1% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 7 June 2026.
Smart Door/Window Sensor (For Home Security Kit 21518) in White
Description:Add on Door/Window Sensor for Smart WiFi Home Security Kit. Maintains a local monitor and alert when your WiFi is down. Wireless, easy to install, and portable which is ideal for renters Sensors and remotes communicate via radio frequency (433MHz) Add up to 24 sensors/ detectors per kit.
Description:Add on Door/Window Sensor for Smart WiFi Home Security Kit. Maintains a local monitor and alert when your WiFi is down. Wireless, easy to install, and portable which is ideal for renters Sensors and remotes communicate via radio frequency (433MHz) Add up to 24 sensors/ detectors per kit.
Last updated at 07/06/2026 18:50:10
Smart Switches & Plugs Door / Window Sensor White ABS - 21518SP002
Delivery $14.99
Smart WiFi Home Security Kit Add On Door/Window Sensor - 21518SP002
Delivery $24.95
Brillant Smart WiFi Home Security Kit Add on Door/Window Sensor
Delivery between 10–17 June $7.90
Brilliant Smart Door/Window Sensor (For Home Security Kit 21518) in
Delivery between 10–15 June $11.95
| Installation | Do-it-Yourself installation |
| Construction | Polycarbonate |
| IP Rating | Indoor Only |
| Warranty | 1-year replacement |
| Connectivity Info | RF 433MHz |
Smart Switches & Plugs Door / Window Sensor White ABS - 21518SP002
Delivery $14.99
Smart WiFi Home Security Kit Add On Door/Window Sensor - 21518SP002
Delivery $24.95
Brillant Smart WiFi Home Security Kit Add on Door/Window Sensor
Delivery between 10–17 June $7.90
Brilliant Smart Door/Window Sensor (For Home Security Kit 21518) in
Delivery between 10–15 June $11.95
| Installation | Do-it-Yourself installation |
| Construction | Polycarbonate |
| IP Rating | Indoor Only |
| Warranty | 1-year replacement |
| Connectivity Info | RF 433MHz |
