Philips
Philips LRM3420W/27 Window and Door Alarm 2-Pack
★★★★★
Enhance Your Home Security with Simple, Effective Protection The Philips Personal Security Window and Door Alarm provides an easy-to-install and cost-effective security solution for your home. This 2-pack set offers reliable protection with magnetic sensors and loud 120-decibel alarms that deter ...
$15.97*
View on Amazon
✓ In Stock on Amazon.com
*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.
Notice a mistake? Let Us Know
Overview
Enhance Your Home Security with Simple, Effective Protection
The Philips Personal Security Window and Door Alarm provides an easy-to-install and cost-effective security solution for your home. This 2-pack set offers reliable protection with magnetic sensors and loud 120-decibel alarms that deter intruders. Choose between alarm or chime modes for customized alerts. The wireless design allows for quick and simple installation on windows and doors in homes, apartments, RVs, and more.
Specifications:
- Brand: Philips
- Model: LRM3420W/27
- Type: Window and Door Alarm
- Quantity: 2 Pack
- Alarm Volume: 120 dB
- Sensor Type: Magnetic Contact Sensor
- Installation: Easy, Wireless Installation
- Power Source: Battery Powered (LR44 button batteries included)
- Modes: Alarm / Chime / Off
- Color: White
Key Features
Safe and Secure – Ward off would-be intruders with a 120-decibel alarm triggered by a high-quality magnetic sensor, or choose for a chime to sound when windows or doors are opened and closed
User Friendly – Features an easy-to-use OFF/chime/alarm switch on the side of the alarm to let you choose your preference of alert, comes in a set of four to provide extra coverage for your home
Easy Install – Experience completely wireless and hassle-free mounting with the included double-sided tape, everything you need is included in the box
Battery Operated – Powered by four long-life LR44 button batteries (included) and features a battery test button and low battery indicator to keep you notified of current power levels
Peace of Mind – This home security product is designed to fortify your home with a reliable layer of protection, empowering you to live your life free of worry
Specifications
Brand
Philips
Model Number
LRM3420W/27
Quantity
2-Pack
Alarm Volume
120-decibel
Sensor Type
High-quality magnetic sensor
Alert Modes
Alarm, Chime
Installation
Wireless, Double-sided tape (included)
Power Source
4x LR44 button batteries (included)
Battery Features
Battery test button, Low battery indicator
Pros & Cons
👍 Pros
- Features a powerful 120-decibel alarm, effectively warding off would-be intruders upon activation.
- Offers versatile alert options, allowing users to choose between a loud alarm or a chime when doors or windows open.
- Comes in a convenient 2-pack, providing coverage for multiple entry points in your home.
- Ensures completely wireless and hassle-free mounting with the included double-sided tape, simplifying installation.
- Equipped with a battery test button and a low battery indicator to keep you informed of current power levels, ensuring continuous protection.
👎 Cons
- The alarm is solely triggered by a magnetic sensor, limiting its detection capabilities compared to motion or glass-break sensors.
- Only comes in a 2-pack, which may not be enough for larger homes with numerous windows and doors needing protection.
- Uses LR44 button batteries, which might not be as common or long-lasting as standard AA/AAA batteries for some users.
- The "user friendly" switch for OFF/chime/alarm is on the side, which could be accessible to intruders if the alarm is mounted within reach.
- The product does not mention smart home integration or remote monitoring capabilities, focusing solely on local alerts.
Frequently Asked Questions
How loud is the alarm on these Philips window and door alarms?
These Philips window and door alarms feature a powerful 120-decibel alarm, designed to be very effective at warding off would-be intruders.
Can I choose a different alert sound instead of the loud alarm?
Yes, you can choose between a loud alarm to trigger when a window or door is opened, or a chime to sound, using the OFF/chime/alarm switch on the side of the unit.
How easy is it to install these alarms?
Installation is completely wireless and hassle-free, as the alarms come with included double-sided tape for mounting, so everything you need is in the box.
What type of batteries do these alarms use, and are they included?
These alarms are powered by four long-life LR44 button batteries, which are included, and they also feature a battery test button and a low battery indicator.
How many alarms are included in this package?
This product comes as a 2-pack of window and door alarms, providing coverage for multiple entry points in your home.
Related Products
