433Mhz Wireless Door Contact Sensor [S212]
https://www.youtube.com/watch?v=KwqdL7r8VGY
* Specs
Feature:
100% Brand New!
Wireless door / window entry detector.
These sensors are used to
protect the opening of doors and windows.
Easily mounted by adhesive tape to window or door.
specification:
Working frequency: 433 MHz.
Power supply: battery 23A(include).
Working distance: more than 100 m.
Working temperature: -10-50.
Size: approx. 70x37x15
Battery Type : Alkaline 23A 12V
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