🔐 Secure smarter, live freer — don’t let your guard down!
The KERUI 433MHz Wireless Door/Window Magnetic Sensor is a compact, battery-powered security device designed to instantly alert you when doors or windows are opened. Compatible with all KERUI alarm systems, it operates on a reliable 433MHz frequency with a communication range up to 250 feet. Easy to install with self-adhesive tape and featuring a low battery LED indicator, it ensures continuous protection for your home or business.
| Number of batteries | 1 12V batteries required. (included) |
| Voltage | 12 Volts |
| Control method | App |
| Noise level | 140 dB |
| Mounting type | Door Mount |
| UPC | 607467345691 |
| Manufacturer | KERUI |
| Package Dimensions | 12.5 x 10.7 x 2.5 cm; 50 g |
| Batteries | 1 12V batteries required. (included) |
| Size | D022 Door/window Sensor |
| Style | Door/Window Magnetic Sensor |
| Installation method | Self Adhesive |
| Included Components | Battery |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Item Weight | 50 g |
S**7
Good and works as expected
Just the same as the original one I bought with the kit.Had to bind it to my system, the instructions I already had made quite easy work of that, basically switching the main unit on and off a few times till the right beep sequence was emittedOne thing that bugged me with the original one was how quick the battery ran out, then I tried to fit a larger rechargeable battery of the same voltage but it blew the door sensor, that's why I've had to buy this one ! Instead this time I've fitted an on off switch, successfully , much better now ! Eco friendly and pocket friendly
M**S
Good item
Bought 11 pieces in addition to the Kerui home alarm system set. Total 21 pieces as part of the home alarm system, none defective. Able to trigger the alarm as far as 20m from control panel (maximum distance in my house) with 2 stone walls in between.
J**O
Good
Good purchase
A**R
Easy to use
Great cheap way to secure your house etc
N**E
Fairly easy to set up
Got this to add to my system as the alarm only came with two contacts and my shed needed three to fully protect. No instructions came with it but the alarm instructions did kind of explain how to pair it. After a few tries I got it sorted and works fine.
B**1
Works fine but flimsy
Works fine, consistently and with a good range given the extendable antenna.However, plastic case and back doors are quite flimsy.
G**E
Effective
Bought for garage door as part if a raspberry pi based diy alarm system. Good range at a good price.
L**.
Perfect replacement
I bought this to replace a sensor to use with my alarm as the one that came with the unit suddenly stopped working. Connected first time with no problem to the existing system and works perfectly. Will definitely buy again if we need any additional sensors.
Trustpilot
2 weeks ago
2 months ago
