This contact sensor alarm can help to deter the intruder, wake or alert you if at home and possibly alert eighbors. 

1.  Compact, magnetically triggered alarm sounds when window or door is opened  2. Multi-purpose – includes entry chime setting that alerts you when people or children are coming & going when you’re home 3. Useful in various applications – ideal for bedrooms, hotels, garage, apartments & dorm rooms; pool safety alarm; sliding glass door&windows;interior door alarm; fridge open 4. Easy to change from off to chime to alarm mode by remote  5. Easy to install – self-adhesive types included 

 ✅KID’SAFE GUARDER- Excellent Home use product,tiny and fashion, install for kids safety, such as for staircase refrigerator door alarm, patio door alarm, pool door alarm. 

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An alarm need two 2AAA alkaline batteries ( not included ).  A remote need a 12V/27A alkaline battery ( included ).  They can work for at least a year with low-consumption design. Not only an alarm, but also a doorbell&reminder for children and elderly when opening door.  Package Size: 4.2*2.5*1.5inch  Package Weight: 71g  Package: 2* Alarm, 2* Magnet box, 2* Remote Controller, 2* User Manual  note: This one has no vibration sensing function, the other one has B07KPKLBCR