When the door is moved it triggers the 118 dB alarm to let your team know the location of movement. Use multiple units for large locations. Adjustable Sensitivity The trigger has three levels of sensitivity (High, Medium, Low). No Wiring Needed Quick Easy Deployment No need to wire your house with high tech security systems you probably dont even know how to use. Simply install the 9V battery and place in front of the door you want to detect movement from.
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