Always wanted to build your own security system and integrate into your home automation solution. Well now you can with the DW2-Wifi sensor from Sonoff. The sensor has a built in battery (not included) that can last for more than a year and therefore doesn't require any wires to be drawn to the sensor.
This is the WiFi version, to connect to your WiFi network.
Remind you when door/window is opened or closed. Keep linkage with SONOFF smart products for your easier smart life.
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