Alarm sensors for doors and windows - Child safety, home, office, shop, garage, dormitory, apartment, camper van, set of 2

【120dB Siren】 - This door/window alarm emits a powerful 120dB sound, effectively detecting any entry and preventing children or babies from leaving. Protect your home or office, whether you are present or not. The sound is audible up to 230 meters away. 【Easy Installation】 - Simply attach this door/window alarm with adhesive, stick it to the window or door, and you're done! No wiring or screws required. Easy DIY installation. (NOTE: Ensure the gap between the alarm and the magnetic part is less than 1.3 cm.) 【Ultra-Slim Design】: With its compact dimensions of 7.4 cm x 3.6 cm x 1.3 cm, this ultra-slim door and window alarm offers two settings: alarm and chime. Ideal for securing your home, office, shop, garage, bedroom, apartment, or even your camper van. 【Extended Battery Life】: Our door and window alarms are equipped with a low battery indicator, letting you know when to replace them. No more worrying about alarm failure. (4 LR44 batteries included per alarm).