YL-333 Magnetic Anti-theft Alarm is a simple Plug and Play security Alarm system. It is two AAA battery operated Alarm system works on magnetic touch. This Alarm produces very loud alarm sound (90dB) will ideally protect against an unwanted intruder or facilitate the work of a guard. YL-333 Magnetic Anti-theft Alarm system is a portable and economical device for multipurpose use. Working Principle: It starts producing sound when small part detaches from the main unit and stop alarming when reattached to each other. The module has an On-Off switch to make it functional whenever required.  This Security System can be easily installed and no wiring required and hence can’t be stopped easily by an unknown person when started. 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. Note: Battery is not included in the package as it is not allowed by Air-Cargo Features: Easy installation with Self adhesive back panel Low power consumption on standby. Plug and Play easy setup and convenient to use. Effective securing of windows and doors with hinge or sliding function, as well as showcases, cupboards etc. The alarm sounds immediately after the door is opened Very easy attachment  using the supplied adhesive strips Defuse by  Switching or closing the window Ideal for house, garage, warehouse, camping, caravan, truck, office space, apartment etc. Package Includes: 1 x YL-333 Magnetic Anti-theft Alarm for Door/ Windows Category: Wireless Smart Switch