Nest H1100WES Nest Detect Sensor
Stick Nest Detect on a window and you'll know when it opens. Stick it on a wall and it senses motion in a room. Stick it on a door and it can do both. With Quiet Open, you can open a door while the house is armed, without setting off the alarm.
Requires a Nest Secure alarm system starter pack.
By purchasing this product you agree that you are either (i) dealer and contractor who are authorized by Nest to purchase and resell the Product as part of an installed application, or (ii) commercial building owner or developer who hires installing contractors or who has trained, professional maintenance staff to install the Product in the buildings of such owner and developer.