Use it on door frame
Model Number:MCS-3202 Brand Name:DSW Place of Origin:Zhejiang China (Mainland) magnetic-contact-sensor-reed-swtich-Normally-Closed-aleph-surface-mount-door-windows-sensor-surface ...
Come From Ningbo Dsw International Co, Ltd
Usage:Auto Place of Origin:Lanarkshire United Kingdom Roller Shutter Door Contact ...
Come From Strathclyde Blinds