Feature:1. Easy To Install: This home security alarm is very easy to install, you only need to hanging the cord on one end of the alarm on the door knob and insert the spring loaded end into the doorway by hand, no tools are needed.2. Multifunctional: This door handle alarm is multifunctional, whether you are in or out of your home, this alarm can provide extra peace of mind by alerting you to any potential intruders, use it on your front door, back door, or even sliding window to deter burglars and keep your family safe.3. Compact And Portable: This apartment door locker alarm is small in size and light in weight, which is very convenient to carry around and use, easily fit into your suitcase, briefcase, backpack, laptop bag, or purse.4. Excellent Plastic Material: This portable door alarm is made of excellent plastic material, which is sturdy and abrasion resistant, not easy to be damaged and has a long service life, with a built in button battery, which is very convenient to use.5. Wide Application: This security window and door alarm has a wide range of applications, it can be used at home, travel, hotel, apartment, dormitory, etc. and can be used on any door or window.Specification:Item Type: Travel Door AlarmSpecification: 1PCSMaterial: PlasticUse: HomeApplicable Scene: Most ScenesBattery Type: Button Battery (Included)Battery Model: CR2032Battery Capacity: 2 x 210mAhBattery Quantity: 2.Package List:1 x Travel Door Alarm1 x English Manual