Wifi alarm sensor (2 pieces) | BeSmart™

This pair of Home Automation sensors were the right choice, I needed to keep an eye on the door of the house and the French window, I was very happy with the easy pairing with the app and with Alexa interacting, in about 5 minutes I managed to set up the network and physically install these sensors, the package includes very strong and thick adhesive (2 pcs) and also a minimum of screws for a fixed and irremovable assembly.
Excellent quality and fast delivery! Now I will continue on the other windows, having
Found this good quality and the signal is really very fast, notifications arrive in real time on my smartphone.

The sensors are ok, great idea to use standard batteries and not button cells. I agree with those who said that if they were rechargeable via USB they would be perfect.The Tuya app works

Excellent product to monitor the opening and closing of doors and windows, it interacts very well with Alexa which instantly notifies the opening and/or closing of the circuit, I recommend it, I personally use it to know if a door that I don't have in sight at work is opened, it works very well

minimal packaging for this object in Xiaomi look for those who know the brand, good materials, plastics and quality finishes.

In the package the magnet, the feel, two stickers one for each piece. A shoulder pad for the reset and the first pairing of the device.

Once the batteries are inserted, you can receive the device by holding the shoulder strap in the appropriate hole for 5 seconds. The device will flash, the Tuya Smart app (or one of its many derivatives) will recognize it by clicking "add device" and that's it.

The sensor is well made and works very well. I used the SmartLife app and it was recognized immediately and automatically integrated into Alexa