This product comes with 3 AA batteries (pre-installed)

This product is easy to install. Simply attach the main unit to the door frame and the secondary unit to the door or both sides of the window. Please note the sensor position.When someone illegally opens a door or window (separation of main and auxiliary parts exceeds 10mm), the alarm will emit a ≥105DB alarm sound to warn the intruder to leave. One can open the door or window by switching.

★ Applicable Scope：Installed in homes, offices, warehouses, such as doors, cabinets, drawers, which are not allowed to be opened by others, when thieves break through the door or window; or when a stranger opens the door of the hotel when you are away, it will trigger an alarm, please check immediately to ensure that your property and safety are not harmed in the slightest.

To prevent theft and robbery, people have come up with many methods, and many of them, costing several thousand yuan, are also very popular in the market. However, for ordinary people, it seems that their lives are not worth that much money. Even if they feel uneasy, they are not willing to buy. Here, I recommend a small alarm that only costs a few yuan, but it has grasped the key to preventing theft: All thieves can only enter the room through the door or window. After installing this device, as long as any thief tries to enter through any door or window, an alarm with a loud noise of up to 105 decibels will immediately sound. Since thieves are already nervous, they will definitely flee in fear when they hear the sudden and strong alarm. Because it has grasped the key to preventing theft, it can ensure safety with only a small investment.

Installation Method: Magnetic Control

Alarm sound 105 decibels

Use 3 1.5V batteries

Usage Range:

1. Doors, windows, homes, shops, businesses, etc.

2. Internet cafe computer case anti-theft device This product is convenient to install, just paste the main and auxiliary parts on the cover and case of the computer case, or on the two windows, and align them (leave about 5mm gap).

3. When someone illegally opens the case or window (main and auxiliary parts separated), the alarm will immediately emit a loud alarm to warn the intruder to leave. To open the case, door, or window, it can be controlled by a switch.

4. Suitable for anti-theft in internet cafes, residential buildings, offices, and shop counters. Built-in 90dB alarm output, powered by 3×1.5V LR44 button batteries (included in the device)

Installation Method:

1. Use double-sided tape to fix the main unit to the edge of the door/window.
2. Use a straight line to adhere the other magnetic strip door sensor along the host's indicated line to the door frame.
3. Check the settings, and turn the main switch to the 'ON' position.
4. Open the door and check if the alarm is emitting a siren.