GetTen 10Pcs Wireless Home Door Window Burglar DIY Safety Security Alarm System Magnetic Sensor These sensors are used to protect the opening of both doors and windows can help you focus on your child whether to open the Windows and doors or cabinet ensure the safety of children If a burglar opens the protected door or window, a magnetic switch inside the sensor, will trip, which sets off the security system.Super loud alarm of 90dB, scare thief a Install one at every entrance to make sure your home is protected. With high reliability, frequency stability, low consumption, strong penetrating power and other characteristics It will work with alarm systems, compatible with most standard security system.