These are Outstanding...use a quality double sided tape as the one on it will fail and cause alarm to go off...

Allows me to cover more windows and doors

Already have a system with these sensors and they work just fine

Good price for something I know works well.

Easy installation and seem to work well.

A great product at a good price.

Great product at a great price. Stock up if you may need more.

Quantity and quality for a great price.

Does what its supposed to, and best price

WHY don’t these say refurbished?! That’s important to a buyer and intentionally withheld!!