Wireless Door/Window sensor
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Door & window sensor is combined by two parts, when the gap between the two parts is apart beyond 15 -20mm, then it will be triggered and send signal to the alarm host which will auto-dial the pre-setting telephone or mobile phone.
It is very popular and economical component in the alarm system, which is widely used for door, window, drawer, cabinet, etc.
Wireless installation, wireless transmitter, DIY project
High quality PVC material for the plastic covers
High sensitive chips inside and strong anti-interfere
Battery supply power
LED indicator for Low voltage