Kit of 200 External Retaining Rings and Internal Circlips in Stainless Steel 1.5 to 10 mm

4pcs Wireless Magnetic Door and Window Alarm Sensor for Home Security System, Child Safety - Anti-Intrusion, Anti-Theft, Anti-Burglary Detectors, 120dB Siren with Batteries

Features:

Security System for Your Home - The 120dB siren alarm can not only give thieves a huge shock, but also wake you up from your sleep to prevent a terrible accident. A door and window alarm with wide applications, warning of break-in entry, ideal for homes, offices, hotels, apartments, garages, dorm rooms, or even RVs. Keep Your Children Safe - This wireless magnetic sensor door and window alarm is powerful enough to detect entry, letting you know when your children open doors or windows to prevent children and babies from going outside, whether you are inside or outside the house. (Audible distance up to 750 ft / 230 m). Especially if you have a pool at home, installing a door alarm is essential. Smart and Easy-to-Use Design - Size: 6.4 x 4.25 x 1.7 cm. This door and window alarm boasts a compact size, an alarm sound of >120 dB, and a unique ultra-slim design with 3 adjustable settings (on/off/set). The alarm is triggered by a wireless magnetic sensor: it activates when the front door or window is opened. Easy Installation with Double-Sided Adhesive Tape - Easily mounted on the window or door using the included adhesive tape. No wiring required! No screws needed! You can install this alarm on any window, door, drawer, or other flat surface. Simple Operation with Included Batteries - The door and window alarm operates on three LR44 button cell batteries. Each alarm comes with three LR44 button cell batteries, and we also provide 10 extra batteries. When the alarm is weak, you should replace the batteries to better protect your home. 3 Adjustable Settings: ON/OFF/SET Flip up to ON: Open the door; the alarm will continue to sound. Close the door to stop the alarm. Flip middle to OFF: Turns the device off. Flip down to SET: This is the reminder mode to close the door or window. It emits a "DI… DI… DI" sound to remind you that the door/window must be closed. The alarm will stop until the door or window is closed. Features: Easy to install, designed for door and window security. Installation with double-sided adhesive tape; firm and convenient. (The double-sided tapes used separately for the alarm and magnetic strip are included.) Easy to use, one-button switch control. Energy saving; battery included, ready to use. (Each alarm contains 3 LR44 button cell batteries; we also provide 10 extra batteries.) System Operating Principle

Alarm triggered by a wireless magnetic sensor. It will sound an alarm when the distance between the alarm and the magnetic strip exceeds 10 mm.

Application Scenarios

Home/dormitory/hotel anti-theft; prevents children from climbing out of windows and falling; prevents thieves from sneaking through windows; secures valuables in drawers

Power Supply: 3 LR44 button cell batteries

Note: When the alarm's signal is weak, you should replace the batteries to better protect your home.

Installation

Easily mounted on the window or door using the double-sided adhesive tape.

No wiring required! No screws required!

Step 1: Stick the double-sided adhesive tape to the back of the alarm and the magnetic strip. Step 2: Wipe the corresponding area on the door/window, stick and secure the alarm, then press firmly. Step 3: Follow step 2, stick and secure the magnetic strip. The gap should be less than 10 mm (the two small triangles on the alarm and the magnetic strip must be aligned). Step 4: Test the alarm. Activate the alarm, open and close the door or window to check if the alarm is working correctly.

Specifications:

Alarm sound: >120 dB

Alarm size: 6.4 x 4.25 x 1.7 cm

Package size for 4 alarms: 19 x 7 x 3 cm

Weight per alarm: 32 g

Package weight: 150 g

Package includes:

4 x Door and window alarms (each alarm contains 3 LR44 button cell batteries)

10 x Additional LR44 batteries