OnvisThread-Enabled HomeKit Door Window Contact Sensor,Wireless Mini Low-Energy Contact Sensor for Alarm System and Smart Home Automation, No Hub Required(2Pack)

These sensors respond quickly and have a long battery life. They’re easy to add to HomeKit and stick in a variety of applications. When I had an issue, Onvis support was quick to help me resolve it.

I’ve had multiple sets of sensors from Onvis and they work perfectly. Installation is easy and connectivity is smooth. The one and only time I had a connection issue with one of them, I contacted customer service and they were very helpful and even offered to replace for a new one. 100% recommend.

A perfect affordable item if you’re looking to pair it within your Apple HomeKit system. Customer service is prompt and informative with any questions/concerns you may have and are eager to help.

I bought these sensors to add to our mailbox to be alerted when our mail came. I paired it with a smart bulb that turns green when the sensor is opened, and it works perfectly!The only downside is our mailbox is in a room without heating which lead to the battery dying within about a week. I have zero doubt that using the device within the recommended temperature ranges would solve this problem, but it is worth knowing that cold drains these batteries quickly.

The sensors work as advertised. Homekit installation was easy though not without some hiccups. The mounting adhesive totally failed after two days releasing from both wood and metal doors and frames painted with latex. Very disappointed and mounted with 3M Heavy Duty double sided tape. A week later and that's holding.