Magnetic Window and Door Alarm (2-Pack)
Quick take
This 2-pack of magnetic window and door alarms uses a contact sensor to trigger an audible alert when a door or window opens. The included setup method is simple, it mounts indoors with double-sided tape and runs on LR44 batteries. The biggest caveat is that the alarm is extremely loud, so it is better suited for alerting you during potential entry or waking someone than for quiet everyday notifications.
Pros and cons
Pros
- Instant contact trigger when the magnet separates, creating an immediate alert.
- Two sound modes, including a 120 dB siren and a chime setting.
- No wiring required, designed for wireless mounting indoors with included double-sided tape.
- Easy off/chime/alarm control for choosing how it alerts you.
- Battery status indicator helps you spot low power.
Cons
- The siren is very loud, which can be disruptive if you set it off frequently.
- Not a smart home device, there is no app or phone control built into the alarm system.
- Tape mounting is the key dependency, and accurate alignment is important for consistent triggering.
What buyers think
Buyer feedback strongly emphasizes how practical these alarms feel for simple home safety use cases. Many people describe the installation as straightforward, especially because the set uses included adhesive for wireless mounting. A recurring theme is the loudness of the alarm mode, which multiple shoppers consider sufficient to wake them or create a noticeable deterrent effect. Shoppers also tend to like the flexibility of switching between alarm and chime behavior, and they report that the sensor responds quickly when the magnet separates. At the same time, buyer-review evidence is limited on long-term durability of the adhesive over changing temperatures or surfaces, so reliability can depend on installation quality and placement.
How it works and what you’re actually buying
This is a basic contact alarm kit. Each unit includes a magnet and an alarm base. When a window or door opens, the magnet separates from the alarm base, and the unit sounds either a siren (120 dB) or a chime, depending on the selected mode.
Key features that matter for real-world use
120 dB alarm mode for urgent alerts
The siren output is rated at 120 decibels, which is why shoppers often mention it as a true wake-up level alert. This is best viewed as an “entry point alert” rather than a gentle notification.
Chime mode for lighter notifications
You can switch to a chime setting for less intense alerts. In practice, that mode is intended to confirm activity (like opening a door) without using the full siren. Keep in mind that even the chime can still be noticeable, so consider where you place the alarm.
Simple control switch
The alarm includes an easy-to-access switch with off/chime/alarm options, making it straightforward to change behavior without digging out instructions.
Wireless, indoor mounting with double-sided tape
Installation is designed to be hassle-free because there is no wiring. The system is meant for indoor mounting only, and accurate alignment is important because the sensor must correctly detect magnet separation.
Battery-powered convenience (LR44)
The alarms run on four LR44 batteries per unit (batteries are included). There is also a low-battery indicator so you are not waiting for a failure to realize it is time to replace them.
Who this magnetic alarm 2-pack is best for
- Parents and caregivers who want an instant alert when a door or window opens unexpectedly.
- Renters and apartment dwellers who want an affordable add-on without drilling or wiring.
- Anyone using entry-point reminders, like for bedrooms, cabins, dorm rooms, or RV/camper doors and windows.
- People who need a loud deterrent-style alert more than a silent or connected notification.
Who should consider something else
- If you want smart home integration or app-based monitoring, this system is not positioned as a smart device.
- If you need quiet, frequent notifications, the siren is likely too intense for continuous everyday use.
- If you cannot reliably mount with adhesive (for example, on difficult surfaces or in areas where tape adhesion is uncertain), you may find consistency harder than expected.
Pros and cons recap
Buyers generally like this set for fast setup, easy control, and strong alert volume. The main tradeoff is loudness and the fact that tape placement quality and alignment influence whether triggers feel consistent.
Price and availability
Check the latest price and pack availability before ordering, since value can change over time for entry-level home alarm accessories. If your goal is coverage for multiple doors or windows, this 2-pack can be a straightforward starting point, and you can add more units later if you need additional coverage.
Want to see the current listing details and price? Buy on Amazon
FAQs
How loud is the alarm mode?
The siren alarm is rated at 120 decibels, which is why many buyers describe it as loud enough to wake them and be very noticeable.
Does it use an app or smart home features?
No, this is not positioned as a smart home or app-controlled alarm system. It works as a standalone contact alarm with selectable sound modes.
Is it difficult to install?
It is designed to be easy to install because it is wireless and mounts indoors with included double-sided tape. Careful alignment helps ensure the magnet separates reliably when the door or window opens.
What batteries does it use?
It uses LR44 batteries, with four included per alarm unit.
Can I use it as a door chime instead of a siren?
Yes, the unit includes a chime option, along with an off setting and the alarm mode. The chime is intended for lighter alerts, while the siren is for urgent notifications.
Is it for windows, doors, or both?
It is made for both, as long as you mount the alarm base and magnet so they separate when the opening occurs.
Specifications
| Product Title | Magnetic Window and Door Alarm (2-Pack) |
|---|---|
| Category | Electronics > Security & Surveillance > Home Security Systems |
| Brand | UltraPro |
| Manufacturer | Jasco Products Company |
| Model Number | 45115 |
| Color | Door/Window |
| Size | 2 Pack |
| Item Weight | 0.2 Pounds |
| Product Dimensions | 2.3"L x 0.6"W x 2.3"H |
| Power Source | Battery Powered |
| Compatible Devices | Tablet,Smartphone |
| Battery Description | LR44 |
| Number of Batteries | 4 Nonstandard Battery batteries required. (included) |
| Voltage | 6 Volts |
| Control Method | App |
| Audible Noise | 120 Decibels |
| Mounting Type | Window Mount, Door Mount |
| Sensor Technology | Contact Sensor |
| Smart Home Compatibility | Not Smart Home Compatible |
| Item Dimensions L x W x H | 2.3"L x 0.6"W x 2.3"H |
| Global Trade Identification Number | 00043180451156 |
| Mfr Part Number | 45115 |
| Unit Count | 2.0 Count |
| Item Type Name | UltraPro Personal Security Window and Door Alarm |
| Built-In Media | 2 Alarms |
Available variants
Style
- 2 Pack
- 5 Pack
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