Smart WiFi Door Sensor: Wireless Window Sensor with App Notification Alert, Tuya Door Open Contact Sensor for Home Security, No Hub Required, Compatible with Alexa Google Assistant

Easy to install and works well with Alexa. I have it on a door on the far side of the house so now I can ask Alexa if the door is open instead of walking to the other end of the house to find out.

If I did have a complaint, it would be about the raucous alarm sound it emits, fortunately it can be turned off.

Pros: I recently got to test if this would work from a whole other state which I was worried about and the alert response time not only worked but was on time! There are times it gets a little delayed or the time and dates don’t match the alerts but I find that I just have to open the app every once in a while to get it synced up and working perfectly again. I haven’t figured out how to add it to my Apple Home app but for my needs it doesn’t really matter. It says you have to scan the barcode to do that but that isn’t working for me but honestly I haven’t given it much effort. I set it up without having to read the instructions cause it was so simple. The alarm only works if you have your phone ringer on, which mine is always off but the notification on silent is enough for my needs. The few times I’ve had my ringer on, the alarm is a nice touch and draws attention. I haven’t had to switch the batteries on it yet and I’ve had it for maybe 4 months now.Cons: the adhesive it came with doesn’t last that long. The adhesive lasted probably around 2 months and then randomly fell off the wooden door in the middle of the night but the device seemed completely unharmed and still works the same. I switched the adhesive for a much stronger one and absolutely no issues since. I’d probably start with a stronger one from the beginning.

In theory, this product is fine - it does what it's supposed to do... kind of. But the execution is all off.The good: you open/close the door, it notifies you on the app via a push notification.The bad: you'll get a notification sometime between 2 seconds and 30 MINUTES after the door is opened.I purchased this so that, as someone who lives alone, I would be alerted if someone enters the front door while I am not paying attention, or so that I could walk my dog around the building without having to lock the door. A notification 30 minutes (not exaggerating here - literally 30) after the door is used is pointless to me. It's actively unhelpful if, after I've come in for the night, gotten ready for bed, and am just starting to drift off, THE NOTIFICATION FINALLY COMES IN AND WAKES ME UP.Trash tier product. I neglected sending it in during the refund window so I am just throwing the item in the trash. It "does not spark joy" by a large margin.Extra demerits for dishonest documentation that verges on industrial gaslighting. The company says something like "there may be a slight delay in notifications if your wifi is slow." If the range of delay was 1-3 seconds, I could mayyyyybe think that on my blazing fast wifi with 1Gbps internet, something on one of my devices was hogging the bandwidth for a moment. But in actual fact (as a former network engineer) this is like the company making a frying pan out of particle board and then writing "if your food is full of wood chips, you probably live in a construction zone." The problem is not the wifi, it's the manufacturer's network infrastructure/design, so if you're in this boat also, don't let them convince you that you're the one with the problem.

Requires minimum signal to operate. Notifications are strong and no false alarms. It is in my front yard Free Library on the door. People have been stealing all the books at one time. It notifys me everytime the door is opened. Adhesive is aveage, I used super glue on the door piece and velcro on the transmitter. I recommend this sensor. The App is easy to use and you don't have to pay for standard use. And the battery life is great... months at a time. Still on original one in Oct.

I'm using this as a mailbox sensor in a METAL mailbox approximately 100 ft. from my router. It uses Smart Life as an app which is supported by Alexa. Sometimes Smart Life reports that the sensor is offline (understandable due to the metal mailbox) but it never fails to notify when the mailbox is opened/closed.

Cumplen a cabalidad su funcion, en principio, pensaba que por si mismo sonaba una alarma, pero despues me di cuenta que la notificacion se envia a la app. Pero si tienes Alexa o google home, puedes configurar una alarma para que salgan por los altavoces.Muy facil de instalar y cumple con su cometido

Works well. It goes off a few times when the door isn’t open but that’s okay.Helps me know when someone enters my home when I am not there