This clever smart sensor uses infrared technology to alert you if it senses movement in your home, and if your windows are opened or closed - perfect for keeping your home secure when you can't be there. Connect it up to the Hive Hub and then to your phone, tablet or laptop to receive notifications if something is detected. You can then turn the alerts off when you're at home. This handy device will not only provide you with a modern security system, but with peace of mind. Features and Benefits Senses movement - And alerts you if someone or something moves in your home. Senses windows - To tell you if they are opened or closed when they shouldn't be. Smart technology - Allows you to connect to this sensor from anywhere. Specifications Dimensions: H2.4 x W8.4cm Requires the Hive Hub (included in Hive Active Heating)