An open window or terrace door - each of us often wonders if we closed them after leaving the house. The window/door opening sensor will show you their status. By mounting it on the front, terrace, balcony or door, or on the window, you don't have to wonder if everything is alright at home when you go for a trip. The sensor will inspect the windows and doors, and an app on your mobile device will notify you if any of them is opened. An alarm will let you know when the battery is low. Learn more about Kanlux SMART at www.kanluxsmart.com.