120dB Magnetic Door & Window Security Alarm Sensor
120dB Magnetic Door & Window Security Alarm Sensor
120dB Magnetic Door & Window Security Alarm Sensor
Keep your home, office, or warehouse protected with this compact and powerful magnetic sensor alarm. When a door or window is opened without authorization, this device instantly triggers a piercing 120dB alarm — loud enough to startle intruders and alert everyone nearby. Simple to set up and powered by a standard 9V battery, it's an affordable first line of defense for any entry point.
Key Features
- 120dB High-Decibel Alert: An ear-catching alarm tone activates the moment the sensor detects unauthorized entry — effectively deterring intruders and notifying those in the area.
- Easy No-Tool Installation: Comes with double-sided adhesive tape for tool-free mounting on doors, windows, drawers, file cabinets, safes, garages, and more.
- Durable ABS Construction: Made from strong, lightweight ABS plastic designed for long-lasting everyday use.
- Low Power Consumption: Runs on a single 9V battery (not included) with minimal power draw for extended service life.
- Convenient ON/OFF Switch: Easily arm or disarm the alarm yourself — no special tools or apps required.
- Compact & Discreet: Slim 10 × 5 × 2.2 cm profile fits neatly on virtually any door or window frame.
- Wide Application: Ideal for homes, apartments, offices, factories, warehouses, and retail spaces.
How It Works
Attach the main sensor unit to the door or window frame and the magnetic auxiliary piece to the moving door or window panel, keeping the auxiliary arrow aligned with the side mark of the main unit (approximately 5mm gap). When an intruder forces the door or window open — separating the two pieces by more than 10mm — the 120dB alarm activates immediately. To open the door yourself, simply toggle the ON/OFF switch before opening.
Specifications
| Material | ABS Plastic |
| Color | White |
| Alarm Volume | 120dB+ |
| Power Supply | 9V Battery (not included) |
| Wire Length | 13 cm / 5.12 in |
| Dimensions | 10 × 5 × 2.2 cm / 3.9 × 2.0 × 0.8 in |
| Product Weight | ~59 g |
| Package Weight | 69 g / 2.4 oz |
| Country of Origin | Made in China |
Package Contents
- 1 × Magnetic Sensor Alarm Unit
- 1 × Double-Sided Adhesive Tape
- 1 × User Manual
- Battery NOT included
Important Usage Notes
- Keep away from high temperatures or open flames.
- Do not expose to water or rain.
- Check the battery regularly to ensure the device is always ready.
- Do not disassemble or modify internal components.
Learn More About Home Security
For tips on improving your home's security, visit the U.S. Consumer Product Safety Commission (CPSC) Home Safety resource.
Frequently Asked Questions
Q: Does this door and window alarm require professional installation?
A: No professional installation is needed. The package includes double-sided adhesive tape, so you can mount the magnetic sensor alarm on any door or window in minutes — no drills or tools required.
Q: Is the 9V battery included with the magnetic sensor alarm?
A: The battery is NOT included. You will need one standard 9V battery (widely available at most hardware or grocery stores) to power the alarm.
Q: Where can I use this magnetic sensor alarm besides doors and windows?
A: This versatile alarm sensor works on doors, windows, drawers, file cabinets, safes, garage doors, and many other entry points — making it suitable for homes, offices, warehouses, and retail environments.
Q: How loud is 120dB and will it actually deter intruders?
A: 120dB is comparable to the sound of a jet aircraft at close range — extremely loud and immediately attention-grabbing. The sudden, piercing alarm is highly effective at startling intruders and alerting neighbors or people nearby.