Security alarm

u still looking for a best Magnetic Sensor Security System, here your dream will come true. The is a YL-333 Entry Wireless Door Window Safety Contact Magnetic Security Alarm. It provides an extra security and convenience for you and your family. Good choice for you!
Features

• New and high quality
• Easy to install
• Powered by 2 pieces AAA 1.5V batteries
• Has a convenient On / Off switch, so you can set the alarm to Off when you do not want to use it
• Features The wireless door window alarm detects vibration of the entry and send a alarm to scare the intruder
• Protecting your shop, office, home or any entrance inside a house requiring protection
• The door window entry alarm is quite convenient and easy to use, affix the mian unit of entry alarm at the side of the door window
• The door window safety alarm can be easily mounted to windows, no tools required
• Extremely loud (90dB) instant alarm

Specifications

• Power Supply 2 x AAA 1.5V batteries (not included)
• Material Plastic
• Color White
• Dimension 1.29" x 0.66" x 3.62" (L x W x H)
• Package Includes : 1 x YL-333 Entry Wireless Door Window Safety Contact Magnetic Security Alarm

Operating instructions:
Use the double - side adhesive tape to fix the main unit at the side of the door / window. Attach the bar magnet to door frame / window frame with the arrow aligning with the reference line of the main unit.
Test the setup by switching the system´s switch to "ON" position of the main unit and see whether the alarm can be triggered by opening the door / window.