The sensors door/windows in WiFi version has delay of 5 to 7 seconds for u receive notification. Already ZigBee version is almost instant notification. So if u do need a permit this sensor, ZigBee version choice. Because the WiFi version not work to make a snapshot of a camera, because when the camera received the command and disparava, not catch the person who entered the gate, unless she opened the gate and stay gate stop in front. WiFi version is cheaper and maybe work for other triggers in automation. But all I buy now will be ZigBee.

The request came in only 17 days, very fast, was posted soon bought. Recommend the seller. The product is good, has the normal delay to a sensor WiFi, but depending on use does not hurt. Is a little Big near the ZigBee have but if stay in a concealed location is very be cheaper. Uses 2 AAA batteries, hopefully last well.

Super recommend, works perfectly with the Alexa, to ask if the door is open or closed. Program to when open or close the door light or delete the light. To issue a warning sound in Alexa as open, close. Not to mention that receive notifications in cell warning. Recommend Super, excellent. Arrived on 15 calendar days

Recommend. It comes with screw and bushing, but not need, a tape 3m already solved well. Hard enough and will stack warning the as yet has available loading app. Already used 1 month and battery intact. Even distant it works well. Has a delay 3 seconds to warn, but meets the purpose. Arrived in 17 days.

The product corresponds to my expectations (without batteries), add the detector in the Smartlife app is made easily, manual in English which simplifies. And it is easy to detach the detector from the door if you have to change the batteries. I recommend it.