YoLink LoRa Smart Door & Window Sensor 3-Pack: Door Left-Open Reminders, up to 1/4 Mile Open-Air Range, up to 5 Year Battery Life, Alexa, IFTTT, Home Assistant

We have a family member with alzheimer's, that wanders at night, and sometimes will trash other rooms in the house. Now my wife can be notified when her mother's door opens or closes and can go downstairs to help her get back in bed. Notification options on this system is superb: SMS messages to phone, the hub speaker sits next to my wife's bed has a choice of alarm sounds--in addition a verbal message "Kathy's door opened", "Kathy's door closed. There is even a "Do Not Disturb" option, where you set a range of time that the device reports door activity. For example, we want to monitor the door only during the night, 10:00pm to 5:00am. A volume control allows you to set just the right volume. For critical alerts, one can enable a loud siren. There are a number of different sensors, such a detecting a water leak, and others I haven't looked at yet. The door unit and hub speaker (that connects to the Internet) will notify you whether you're at home or miles away. These units are packed full of features that I haven't even explored yet. I'm very pleased with this purchase!

Updated:Ordered product with base and 3 remote units, but I only got 2 remotes. Amazon says seller needs to provide additional remote, Seller says Amazon needs to provide.Update - Seller reached out and after previous lower review and apologized for getting the run-around and initial poor support. Seller made it right, updating to 5 Stars only due to quality of product.So far I am very pleased with the product it has solved a need to monitors doors left open or not closed all the way. The app is fairly intuitive for someone in the IT industry looking for ability to manage rules. Alexa app integration is OK, however it is missing the ability on these sensors to alert if door is open for longer than XX minutes, I have to use the YoLink hub only for that.

Best in coverage rangeBattery life completed 1 year for very active doors (now 25%). While less used doors still above 75%.Size is a bit big.Overall happy with the product

If my son wakes up in the night or morning before me we opens his door and my pre recorded message plays in my room and I am able to intercept him before he wonders where we are. Great for kids or elderly who may wander out of doors.

Have all my entrances covered. Love the yolink security ecosystem.