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

General Description This home security system includes four wireless magnetic sensor door and window alarms, ideal for preventing break-ins. With a powerful 120 dB siren, these alarms can not only deter thieves but also alert you while you sleep. They are perfect for use in various environments such as homes, offices, hotels, apartments, garages, and even recreational vehicles. Furthermore, they help keep your children safe by detecting when doors and windows are opened, with an audible range of up to 230 meters. Technical 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 Compatibility and Accessories Operates on 3 LR44 button cell batteries per alarm (included) 10 additional LR44 batteries supplied Installation Easy installation with double-sided adhesive tape No wiring required No screws required Use Can be installed on all windows and doors, as well as on drawers and other flat surfaces Simple settings: on/off/set