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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🚪🔔 Protect your space with a silent guardian that screams when it matters!

EFFORTLESS SETUP - No wiring or screws—just peel and stick for instant home security.
SLEEK DISCREET - Ultra-slim magnetic sensor fits seamlessly on doors and windows without ruining aesthetics.
INSTANT INTRUDER ALERT - 120dB alarm blasts loud enough to stop any break-in in its tracks.
SMART SAFETY FOR FAMILIES - Prevents kids from wandering off and alerts you immediately if doors/windows open beyond 1cm.
BATTERY LIFE YOU CAN TRUST - Includes 3x LR44 batteries with low battery indicator so you’re never caught off guard.

The Noopel Door Window Alarm 2 Pack offers a powerful 120dB wireless magnetic sensor alarm system designed for quick DIY installation with no tools required. Its ultra-slim profile fits discreetly on doors and windows, instantly alerting you to unauthorized openings beyond 1cm. Perfect for home, office, or apartment security, it also helps keep children safe by notifying you if they open doors unexpectedly. Powered by included LR44 batteries and featuring a low battery indicator, this affordable alarm system is a must-have for proactive protection.

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Battery description	battery_type_LR44
Voltage	1.5 Volts
Control method	Touch
Noise level	120 Decibels
Mounting type	Adhesive Mount
Sensor technology	Contact Sensor
UPC	765629470862
Manufacturer	Noopel
Part Number	RK-KDS3-FBMM
Product Dimensions	7.3 x 3.5 x 1 cm; 32 g
Item model number	MCJBQ820
Installation method	Self-Adhesive
Item Package Quantity	2
Switch style	Slide switch
Batteries included?	No
Batteries Required?	No
Item Weight	32 g

Door Window Alarm 2 Pack Noopel Home Security Ultra-Slim Wireless Magnetic Sensor Burglar Anti-theft 120DB Alarm with Batteries included - DIY EASY to Install

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