Does it work with sliding doors?

I would say yes - the sensor and magnetic contact are separate - when sticking on try without removing the adhesive backing on either the magnet or sensor to get the correct position - when you have mark lightly with a pencil and then apply - mine work great and still give me a shock (with the noise) when i forget to flick the switch off. Hope it works well for you

When i installed the alarm on my door, i switched it on and it is continously making the alarm sound?? What do i do to stop it?

Hi Ashley, possible because the gap between the alarm and little strip is larger than 10mm. if so, the only way to stop it is to switch off.

Do both sections have to be at the same level as my door has a trim/lip which is 1.5cm higher

They have to be level and in line I glued a piece of wood on frame to line up works great

Battery life since august 21 I have changed the batteries 3 times .The alarm has never been triggered, except when installed

I can only say that my alarms are all working OK and the batteries i have never changed since arriving about 4 months ago. Do you check they are working on a weekly period. If you have a spare 1 then leave set up in your home side by side. And check to see what's going on...

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Door Alarm Sensor, 120dB Window Alarms for Home Security, Ultra-Slim Wireless Magnetic Sensor Burglar Alarm with Batteries included for House, Flat, Shop, Office & Garage, 2 Pack

Product ID: 48720039

Details

Brand
Noopel
Colour
Silver
Compatible devices
Home Security
Power source
Battery
Product dimensions
38L x 10W x

📏Ultra-slim 38x10x74mm design

🔊120dB piercing alarm

🔋3x LR44 batteries included

21454CFA

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Description

🚪🔔 Don’t just lock it—alarm it! Stay one step ahead with Noopel’s ultra-loud door sensor.

EFFORTLESS SETUP - No wiring or screws—just peel & stick with premium adhesive for instant protection.
SLEEK DISCREET - Ultra-slim magnetic sensor fits seamlessly on doors and windows without ruining your décor.
SMART BATTERY LIFE - Includes batteries plus low battery indicator so you’re never caught off guard.
VERSATILE SECURITY - Perfect for homes, offices, garages, and shops—protect every entry point with ease.
INSTANT INTRUDER ALERT - 120dB alarm blasts loud enough to stop any unwanted entry in its tracks.

The Noopel Door Alarm Sensor delivers a powerful 120dB alert through an ultra-slim wireless magnetic sensor, designed for quick, easy installation with no wiring or screws. Powered by included LR44 batteries and featuring a low battery indicator, it’s ideal for securing doors, windows, cabinets, and more across homes, offices, and garages. Its compact design and adjustable settings make it a cost-effective, high-impact security upgrade that deters intruders and keeps your loved ones safe.

Specifications

ASIN	B073XBCNYS
Battery Description	battery_type_LR44
Best Sellers Rank	5,838 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Home Security Door & Window Sensors
Brand	Noopel
Colour	Silver
Compatible Devices	Home Security System
Control Method	Touch
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (2,027)
Item Dimensions L x W x H	38L x 10W x 74H millimetres
Item Weight	32 Grams
Manufacturer	Noopel
Model Name	MCJBQ820
Model Number	MCJBQ820
Mounting Type	Adhesive Mount
Number of Items	2
Number of Packs	2
Part Number	RK-KDS3-FBMM
Power source	Battery Powered
Sensor Technology	Contact Sensor
Sound Level	120 Decibels
UPC	765629470862
Unit Count	2.0 count

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21454CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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