✅Super loud 90 dB alarm – This Magnetic sensor window door alarm loud enough to detect entry, prevent kids and babies going out the house, protecting your home or office whether you are in or out.

✅ Magnetic sensor switch detects your door or window. When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can issue a strong alarm, warning the intruder to leave and remind the owner.

✅ EASY INSTALLATION – Easy stick installation and operation, press on/off switch to power on/off then insert 2 PCS AAA battery (battery do not contain in the box),tear the double-sided adhesive on the back, paste the door knob alarm on your target position.

(NOTICE: MAKE SURE THE GAP BETWEEN THE ALARM AND MAGNET PART WITHIN 0.6IN.)

✅ ULTRA-SLIM DESIGN – Size: 3.6″ x 1.2″ x 0.8″, this door and window alarm with 2 adjustable settings (on/off). Perfect for home, office, garage, dorm room, apartment or even RV.